def _parseRecordAE(self, line, event):
"""
Parses the 'additional hypocenter error and magnitude record' AE
"""
orig_time_stderr = self._floatUnused(line[2:7])
latitude_stderr = self._floatUnused(line[8:14])
longitude_stderr = self._floatUnused(line[15:21])
depth_stderr = self._floatUnused(line[22:27])
gap = self._floatUnused(line[28:33])
mag1 = self._float(line[33:36])
mag1_type = line[36:38]
mag2 = self._float(line[43:46])
mag2_type = line[46:48]
evid = event.resource_id.id.split('/')[-1]
#this record is to be associated to the latest origin
origin = event.origins[-1]
self._storeUncertainty(origin.time_errors, orig_time_stderr)
self._storeUncertainty(origin.latitude_errors,
self._latErrToDeg(latitude_stderr))
self._storeUncertainty(
origin.longitude_errors,
self._lonErrToDeg(longitude_stderr, origin.latitude))
self._storeUncertainty(origin.depth_errors, depth_stderr, scale=1000)
origin.quality.azimuthal_gap = gap
if mag1 > 0:
mag = Magnitude()
mag1_id = mag1_type.lower()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag1_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(
agency_id=origin.creation_info.agency_id)
mag.mag = mag1
mag.magnitude_type = mag1_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag2 > 0:
mag = Magnitude()
mag2_id = mag2_type.lower()
if mag2_id == mag1_id:
mag2_id += '2'
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag2_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(
agency_id=origin.creation_info.agency_id)
mag.mag = mag2
mag.magnitude_type = mag2_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
def _parse_record_ae(self, line, event):
"""
Parses the 'additional hypocenter error and magnitude record' AE
"""
orig_time_stderr = self._float_unused(line[2:7])
latitude_stderr = self._float_unused(line[8:14])
longitude_stderr = self._float_unused(line[15:21])
depth_stderr = self._float_unused(line[22:27])
gap = self._float_unused(line[28:33])
mag1 = self._float(line[33:36])
mag1_type = line[36:38]
mag2 = self._float(line[43:46])
mag2_type = line[46:48]
evid = event.resource_id.id.split('/')[-1]
# this record is to be associated to the latest origin
origin = event.origins[-1]
self._store_uncertainty(origin.time_errors, orig_time_stderr)
self._store_uncertainty(origin.latitude_errors,
self._lat_err_to_deg(latitude_stderr))
self._store_uncertainty(origin.longitude_errors,
self._lon_err_to_deg(longitude_stderr,
origin.latitude))
self._store_uncertainty(origin.depth_errors, depth_stderr, scale=1000)
origin.quality.azimuthal_gap = gap
if mag1 > 0:
mag = Magnitude()
mag1_id = mag1_type.lower()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag1_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(
agency_id=origin.creation_info.agency_id)
mag.mag = mag1
mag.magnitude_type = mag1_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag2 > 0:
mag = Magnitude()
mag2_id = mag2_type.lower()
if mag2_id == mag1_id:
mag2_id += '2'
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag2_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(
agency_id=origin.creation_info.agency_id)
mag.mag = mag2
mag.magnitude_type = mag2_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
def __toMagnitude(parser, magnitude_el, origin):
"""
Parses a given magnitude etree element.
:type parser: :class:`~obspy.core.util.xmlwrapper.XMLParser`
:param parser: Open XMLParser object.
:type magnitude_el: etree.element
:param magnitude_el: magnitude element to be parsed.
:return: A ObsPy :class:`~obspy.core.event.Magnitude` object.
"""
global CURRENT_TYPE
mag = Magnitude()
mag.resource_id = ResourceIdentifier(prefix="/".join([RESOURCE_ROOT, "magnitude"]))
mag.origin_id = origin.resource_id
mag.mag, mag.mag_errors = __toFloatQuantity(parser, magnitude_el, "mag")
# obspyck used to write variance (instead of std) in magnitude error fields
if CURRENT_TYPE == "obspyck":
if mag.mag_errors.uncertainty is not None:
mag.mag_errors.uncertainty = math.sqrt(mag.mag_errors.uncertainty)
mag.magnitude_type = parser.xpath2obj("type", magnitude_el)
mag.station_count = parser.xpath2obj("stationCount", magnitude_el, int)
mag.method_id = "%s/magnitude_method/%s/1" % (RESOURCE_ROOT,
parser.xpath2obj('program', magnitude_el))
if str(mag.method_id).lower().endswith("none"):
mag.method_id = None
return mag
def __toMagnitude(parser, magnitude_el, origin):
"""
Parses a given magnitude etree element.
:type parser: :class:`~obspy.core.util.xmlwrapper.XMLParser`
:param parser: Open XMLParser object.
:type magnitude_el: etree.element
:param magnitude_el: magnitude element to be parsed.
:return: A ObsPy :class:`~obspy.core.event.Magnitude` object.
"""
global CURRENT_TYPE
mag = Magnitude()
mag.resource_id = ResourceIdentifier(
prefix="/".join([RESOURCE_ROOT, "magnitude"]))
mag.origin_id = origin.resource_id
mag.mag, mag.mag_errors = __toFloatQuantity(parser, magnitude_el, "mag")
# obspyck used to write variance (instead of std) in magnitude error fields
if CURRENT_TYPE == "obspyck":
if mag.mag_errors.uncertainty is not None:
mag.mag_errors.uncertainty = math.sqrt(mag.mag_errors.uncertainty)
mag.mag_errors.confidence_level = 68.3
mag.magnitude_type = parser.xpath2obj("type", magnitude_el)
mag.station_count = parser.xpath2obj("stationCount", magnitude_el, int)
mag.method_id = "%s/magnitude_method/%s/1" % (
RESOURCE_ROOT, parser.xpath2obj('program', magnitude_el))
if str(mag.method_id).lower().endswith("none"):
mag.method_id = None
return mag
def _on_file_save(self):
"""
Creates a new obspy.core.event.Magnitude object and writes the moment
magnitude to it.
"""
# Get the save filename.
filename = QtGui.QFileDialog.getSaveFileName(caption="Save as...")
filename = os.path.abspath(str(filename))
mag = Magnitude()
mag.mag = self.final_result["moment_magnitude"]
mag.magnitude_type = "Mw"
mag.station_count = self.final_result["station_count"]
mag.evaluation_mode = "manual"
# Link to the used origin.
mag.origin_id = self.current_state["event"].origins[0].resource_id
mag.method_id = "Magnitude picker Krischer"
# XXX: Potentially change once this program gets more stable.
mag.evaluation_status = "preliminary"
# Write the other results as Comments.
mag.comments.append( \
Comment("Seismic moment in Nm: %g" % \
self.final_result["seismic_moment"]))
mag.comments.append( \
Comment("Circular source radius in m: %.2f" % \
self.final_result["source_radius"]))
mag.comments.append( \
Comment("Stress drop in Pa: %.2f" % \
self.final_result["stress_drop"]))
mag.comments.append( \
Comment("Very rough Q estimation: %.1f" % \
self.final_result["quality_factor"]))
event = copy.deepcopy(self.current_state["event"])
event.magnitudes.append(mag)
cat = Catalog()
cat.events.append(event)
cat.write(filename, format="quakeml")
def _on_file_save(self):
"""
Creates a new obspy.core.event.Magnitude object and writes the moment
magnitude to it.
"""
# Get the save filename.
filename = QtGui.QFileDialog.getSaveFileName(caption="Save as...")
filename = os.path.abspath(str(filename))
mag = Magnitude()
mag.mag = self.final_result["moment_magnitude"]
mag.magnitude_type = "Mw"
mag.station_count = self.final_result["station_count"]
mag.evaluation_mode = "manual"
# Link to the used origin.
mag.origin_id = self.current_state["event"].origins[0].resource_id
mag.method_id = "Magnitude picker Krischer"
# XXX: Potentially change once this program gets more stable.
mag.evaluation_status = "preliminary"
# Write the other results as Comments.
mag.comments.append( \
Comment("Seismic moment in Nm: %g" % \
self.final_result["seismic_moment"]))
mag.comments.append( \
Comment("Circular source radius in m: %.2f" % \
self.final_result["source_radius"]))
mag.comments.append( \
Comment("Stress drop in Pa: %.2f" % \
self.final_result["stress_drop"]))
mag.comments.append( \
Comment("Very rough Q estimation: %.1f" % \
self.final_result["quality_factor"]))
event = copy.deepcopy(self.current_state["event"])
event.magnitudes.append(mag)
cat = Catalog()
cat.events.append(event)
cat.write(filename, format="quakeml")
o.time = UTCDateTime(2014, 2, 23, 18, 0, 0)
o.latitude = 47.6
o.longitude = 12.0
o.depth = 10000
o.depth_type = "operator assigned"
o.evaluation_mode = "manual"
o.evaluation_status = "preliminary"
o.region = FlinnEngdahl().get_region(o.longitude, o.latitude)
m = Magnitude()
m.mag = 7.2
m.magnitude_type = "Mw"
m2 = Magnitude()
m2.mag = 7.4
m2.magnitude_type = "Ms"
# also included could be: custom picks, amplitude measurements, station magnitudes,
# focal mechanisms, moment tensors, ...
# make associations, put everything together
cat.append(e)
e.origins = [o]
e.magnitudes = [m, m2]
m.origin_id = o.resource_id
m2.origin_id = o.resource_id
print(cat)
cat.write("/tmp/my_custom_events.xml", format="QUAKEML")
# !cat /tmp/my_custom_events.xml
def _parse_first_line_origin(self, line, event, magnitudes):
"""
Parse the first line of origin data.
:type line: str
:param line: Line to parse.
:type event: :class:`~obspy.core.event.event.Event`
:param event: Event of the origin.
:type magnitudes: list of
:class:`~obspy.core.event.magnitude.Magnitude`
:param magnitudes: Store magnitudes in a list to keep
their positions.
:rtype: :class:`~obspy.core.event.origin.Origin`,
:class:`~obspy.core.event.resourceid.ResourceIdentifier`
:returns: Parsed origin or None, resource identifier of the
origin.
"""
magnitude_types = []
magnitude_values = []
magnitude_station_counts = []
fields = self.fields['line_1']
time_origin = line[fields['time']].strip()
time_fixed_flag = line[fields['time_fixf']].strip()
latitude = line[fields['lat']].strip()
longitude = line[fields['lon']].strip()
epicenter_fixed_flag = line[fields['epicenter_fixf']].strip()
depth = line[fields['depth']].strip()
depth_fixed_flag = line[fields['depth_fixf']].strip()
phase_count = line[fields['n_def']].strip()
station_count = line[fields['n_sta']].strip()
azimuthal_gap = line[fields['gap']].strip()
magnitude_types.append(line[fields['mag_type_1']].strip())
magnitude_values.append(line[fields['mag_1']].strip())
magnitude_station_counts.append(line[fields['mag_n_sta_1']].strip())
magnitude_types.append(line[fields['mag_type_2']].strip())
magnitude_values.append(line[fields['mag_2']].strip())
magnitude_station_counts.append(line[fields['mag_n_sta_2']].strip())
magnitude_types.append(line[fields['mag_type_3']].strip())
magnitude_values.append(line[fields['mag_3']].strip())
magnitude_station_counts.append(line[fields['mag_n_sta_3']].strip())
author = line[fields['author']].strip()
origin_id = line[fields['id']].strip()
origin = Origin()
origin.quality = OriginQuality()
try:
origin.time = UTCDateTime(time_origin.replace('/', '-'))
origin.latitude = float(latitude)
origin.longitude = float(longitude)
except (TypeError, ValueError):
self._warn('Missing origin data, skipping event')
return None, None
origin.time_fixed = time_fixed_flag.lower() == 'f'
origin.epicenter_fixed = epicenter_fixed_flag.lower() == 'f'
try:
# Convert value from km to m
origin.depth = float(depth) * 1000
except ValueError:
pass
try:
origin.depth_type = DEPTH_TYPES[depth_fixed_flag]
except KeyError:
origin.depth_type = OriginDepthType('from location')
try:
origin.quality.used_phase_count = int(phase_count)
origin.quality.associated_phase_count = int(phase_count)
except ValueError:
pass
try:
origin.quality.used_station_count = int(station_count)
origin.quality.associated_station_count = int(station_count)
except ValueError:
pass
try:
origin.quality.azimuthal_gap = float(azimuthal_gap)
except ValueError:
pass
self.author = author
origin.creation_info = self._get_creation_info()
public_id = "origin/%s" % origin_id
origin_res_id = self._get_res_id(public_id)
for i in range(3):
try:
magnitude = Magnitude()
magnitude.creation_info = self._get_creation_info()
magnitude.magnitude_type = magnitude_types[i]
magnitude.mag = float(magnitude_values[i])
magnitude.station_count = int(magnitude_station_counts[i])
magnitude.origin_id = origin_res_id
magnitudes.append(magnitude)
event.magnitudes.append(magnitude)
except ValueError:
# Magnitude can be empty but we need to keep the
# position between mag1, mag2 or mag3.
magnitudes.append(None)
return origin, origin_res_id
def _parse_first_line_origin(self, line, event, magnitudes):
"""
Parse the first line of origin data.
:type line: str
:param line: Line to parse.
:type event: :class:`~obspy.core.event.event.Event`
:param event: Event of the origin.
:type magnitudes: list of
:class:`~obspy.core.event.magnitude.Magnitude`
:param magnitudes: Store magnitudes in a list to keep
their positions.
:rtype: :class:`~obspy.core.event.origin.Origin`,
:class:`~obspy.core.event.resourceid.ResourceIdentifier`
:returns: Parsed origin or None, resource identifier of the
origin.
"""
magnitude_types = []
magnitude_values = []
magnitude_station_counts = []
fields = self.fields['line_1']
time_origin = line[fields['time']].strip()
time_fixed_flag = line[fields['time_fixf']].strip()
latitude = line[fields['lat']].strip()
longitude = line[fields['lon']].strip()
epicenter_fixed_flag = line[fields['epicenter_fixf']].strip()
depth = line[fields['depth']].strip()
depth_fixed_flag = line[fields['depth_fixf']].strip()
phase_count = line[fields['n_def']].strip()
station_count = line[fields['n_sta']].strip()
azimuthal_gap = line[fields['gap']].strip()
magnitude_types.append(line[fields['mag_type_1']].strip())
magnitude_values.append(line[fields['mag_1']].strip())
magnitude_station_counts.append(line[fields['mag_n_sta_1']].strip())
magnitude_types.append(line[fields['mag_type_2']].strip())
magnitude_values.append(line[fields['mag_2']].strip())
magnitude_station_counts.append(line[fields['mag_n_sta_2']].strip())
magnitude_types.append(line[fields['mag_type_3']].strip())
magnitude_values.append(line[fields['mag_3']].strip())
magnitude_station_counts.append(line[fields['mag_n_sta_3']].strip())
author = line[fields['author']].strip()
origin_id = line[fields['id']].strip()
origin = Origin()
origin.quality = OriginQuality()
try:
origin.time = UTCDateTime(time_origin.replace('/', '-'))
origin.latitude = float(latitude)
origin.longitude = float(longitude)
except (TypeError, ValueError):
self._warn('Missing origin data, skipping event')
return None, None
origin.time_fixed = time_fixed_flag.lower() == 'f'
origin.epicenter_fixed = epicenter_fixed_flag.lower() == 'f'
try:
# Convert value from km to m
origin.depth = float(depth) * 1000
except ValueError:
pass
try:
origin.depth_type = DEPTH_TYPES[depth_fixed_flag]
except KeyError:
origin.depth_type = OriginDepthType('from location')
try:
origin.quality.used_phase_count = int(phase_count)
origin.quality.associated_phase_count = int(phase_count)
except ValueError:
pass
try:
origin.quality.used_station_count = int(station_count)
origin.quality.associated_station_count = int(station_count)
except ValueError:
pass
try:
origin.quality.azimuthal_gap = float(azimuthal_gap)
except ValueError:
pass
self.author = author
origin.creation_info = self._get_creation_info()
public_id = "origin/%s" % origin_id
origin_res_id = self._get_res_id(public_id)
for i in range(3):
try:
magnitude = Magnitude()
magnitude.creation_info = self._get_creation_info()
magnitude.magnitude_type = magnitude_types[i]
magnitude.mag = float(magnitude_values[i])
magnitude.station_count = int(magnitude_station_counts[i])
magnitude.origin_id = origin_res_id
magnitudes.append(magnitude)
event.magnitudes.append(magnitude)
except ValueError:
# Magnitude can be empty but we need to keep the
# position between mag1, mag2 or mag3.
magnitudes.append(None)
return origin, origin_res_id
def _parse_record_e(self, line, event):
"""
Parses the 'error and magnitude' record E
"""
orig_time_stderr = self._float(line[2:7])
latitude_stderr = self._float(line[8:14])
longitude_stderr = self._float(line[15:21])
depth_stderr = self._float(line[22:27])
mb_mag = self._float(line[28:31])
mb_nsta = self._int(line[32:35])
ms_mag = self._float(line[36:39])
ms_nsta = self._int(line[39:42])
mag1 = self._float(line[42:45])
mag1_type = line[45:47]
mag1_source_code = line[47:51].strip()
mag2 = self._float(line[51:54])
mag2_type = line[54:56]
mag2_source_code = line[56:60].strip()
evid = event.resource_id.id.split('/')[-1]
origin = event.origins[0]
self._store_uncertainty(origin.time_errors, orig_time_stderr)
self._store_uncertainty(origin.latitude_errors,
self._lat_err_to_deg(latitude_stderr))
self._store_uncertainty(origin.longitude_errors,
self._lon_err_to_deg(longitude_stderr,
origin.latitude))
self._store_uncertainty(origin.depth_errors, depth_stderr, scale=1000)
if mb_mag is not None:
mag = Magnitude()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, 'mb'))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id='USGS-NEIC')
mag.mag = mb_mag
mag.magnitude_type = 'Mb'
mag.station_count = mb_nsta
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if ms_mag is not None:
mag = Magnitude()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, 'ms'))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id='USGS-NEIC')
mag.mag = ms_mag
mag.magnitude_type = 'Ms'
mag.station_count = ms_nsta
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag1 is not None:
mag = Magnitude()
mag1_id = mag1_type.lower()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag1_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id=mag1_source_code)
mag.mag = mag1
mag.magnitude_type = mag1_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag2 is not None:
mag = Magnitude()
mag2_id = mag2_type.lower()
if mag2_id == mag1_id:
mag2_id += '2'
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag2_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id=mag2_source_code)
mag.mag = mag2
mag.magnitude_type = mag2_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
def write_qml(config, sourcepar):
if not config.options.qml_file:
return
qml_file = config.options.qml_file
cat = read_events(qml_file)
evid = config.hypo.evid
try:
ev = [e for e in cat if evid in str(e.resource_id)][0]
except Exception:
logging.warning('Unable to find evid "{}" in QuakeML file. '
'QuakeML output will not be written.'.format(evid))
origin = ev.preferred_origin()
if origin is None:
origin = ev.origins[0]
origin_id = origin.resource_id
origin_id_strip = origin_id.id.split('/')[-1]
origin_id_strip = origin_id_strip.replace(config.smi_strip_from_origin_id,
'')
# Common parameters
ssp_version = get_versions()['version']
method_id = config.smi_base + '/sourcespec/' + ssp_version
cr_info = CreationInfo()
cr_info.agency_id = config.agency_id
if config.author is None:
author = '{}@{}'.format(getuser(), gethostname())
else:
author = config.author
cr_info.author = author
cr_info.creation_time = UTCDateTime()
means = sourcepar.means_weight
errors = sourcepar.errors_weight
stationpar = sourcepar.station_parameters
# Magnitude
mag = Magnitude()
_id = config.smi_magnitude_template.replace('$SMI_BASE', config.smi_base)
_id = _id.replace('$ORIGIN_ID', origin_id_strip)
mag.resource_id = ResourceIdentifier(id=_id)
mag.method_id = ResourceIdentifier(id=method_id)
mag.origin_id = origin_id
mag.magnitude_type = 'Mw'
mag.mag = means['Mw']
mag_err = QuantityError()
mag_err.uncertainty = errors['Mw']
mag_err.confidence_level = 68.2
mag.mag_errors = mag_err
mag.station_count = len([_s for _s in stationpar.keys()])
mag.evaluation_mode = 'automatic'
mag.creation_info = cr_info
# Seismic moment -- It has to be stored in a MomentTensor object
# which, in turn, is part of a FocalMechanism object
mt = MomentTensor()
_id = config.smi_moment_tensor_template.replace('$SMI_BASE',
config.smi_base)
_id = _id.replace('$ORIGIN_ID', origin_id_strip)
mt.resource_id = ResourceIdentifier(id=_id)
mt.derived_origin_id = origin_id
mt.moment_magnitude_id = mag.resource_id
mt.scalar_moment = means['Mo']
mt_err = QuantityError()
mt_err.lower_uncertainty = errors['Mo'][0]
mt_err.upper_uncertainty = errors['Mo'][1]
mt_err.confidence_level = 68.2
mt.scalar_moment_errors = mt_err
mt.method_id = method_id
mt.creation_info = cr_info
# And here is the FocalMechanism object
fm = FocalMechanism()
_id = config.smi_focal_mechanism_template.replace('$SMI_BASE',
config.smi_base)
_id = _id.replace('$ORIGIN_ID', origin_id_strip)
fm.resource_id = ResourceIdentifier(id=_id)
fm.triggering_origin_id = origin_id
fm.method_id = ResourceIdentifier(id=method_id)
fm.moment_tensor = mt
fm.creation_info = cr_info
ev.focal_mechanisms.append(fm)
# Station magnitudes
for statId in sorted(stationpar.keys()):
par = stationpar[statId]
st_mag = StationMagnitude()
seed_id = statId.split()[0]
_id = config.smi_station_magnitude_template.replace(
'$SMI_MAGNITUDE_TEMPLATE', config.smi_magnitude_template)
_id = _id.replace('$ORIGIN_ID', origin_id_strip)
_id = _id.replace('$SMI_BASE', config.smi_base)
_id = _id.replace('$WAVEFORM_ID', seed_id)
st_mag.resource_id = ResourceIdentifier(id=_id)
st_mag.origin_id = origin_id
st_mag.mag = par['Mw']
st_mag.station_magnitude_type = 'Mw'
st_mag.method_id = mag.method_id
st_mag.creation_info = cr_info
st_mag.waveform_id = WaveformStreamID(seed_string=seed_id)
st_mag.extra = SSPExtra()
st_mag.extra.moment = SSPTag(par['Mo'])
st_mag.extra.corner_frequency = SSPTag(par['fc'])
st_mag.extra.t_star = SSPTag(par['t_star'])
ev.station_magnitudes.append(st_mag)
st_mag_contrib = StationMagnitudeContribution()
st_mag_contrib.station_magnitude_id = st_mag.resource_id
mag.station_magnitude_contributions.append(st_mag_contrib)
ev.magnitudes.append(mag)
# Write other average parameters as custom tags
ev.extra = SSPExtra()
ev.extra.corner_frequency = SSPContainerTag()
ev.extra.corner_frequency.value.value = SSPTag(means['fc'])
ev.extra.corner_frequency.value.lower_uncertainty =\
SSPTag(errors['fc'][0])
ev.extra.corner_frequency.value.upper_uncertainty =\
SSPTag(errors['fc'][1])
ev.extra.corner_frequency.value.confidence_level = SSPTag(68.2)
ev.extra.t_star = SSPContainerTag()
ev.extra.t_star.value.value = SSPTag(means['t_star'])
ev.extra.t_star.value.uncertainty = SSPTag(errors['t_star'])
ev.extra.t_star.value.confidence_level = SSPTag(68.2)
ev.extra.source_radius = SSPContainerTag()
ev.extra.source_radius.value.value = SSPTag(means['ra'])
ev.extra.source_radius.value.lower_uncertainty =\
SSPTag(errors['ra'][0])
ev.extra.source_radius.value.upper_uncertainty =\
SSPTag(errors['ra'][1])
ev.extra.source_radius.value.confidence_level = SSPTag(68.2)
ev.extra.stress_drop = SSPContainerTag()
ev.extra.stress_drop.value.value = SSPTag(means['bsd'])
ev.extra.stress_drop.value.lower_uncertainty =\
SSPTag(errors['bsd'][0])
ev.extra.stress_drop.value.upper_uncertainty =\
SSPTag(errors['bsd'][1])
ev.extra.stress_drop.value.confidence_level = SSPTag(68.2)
if config.set_preferred_magnitude:
ev.preferred_magnitude_id = mag.resource_id.id
qml_file_out = os.path.join(config.options.outdir, evid + '.xml')
ev.write(qml_file_out, format='QUAKEML')
logging.info('QuakeML file written to: ' + qml_file_out)
def iris2quakeml(url, output_folder=None):
if not "/spudservice/" in url:
url = url.replace("/spud/", "/spudservice/")
if url.endswith("/"):
url += "quakeml"
else:
url += "/quakeml"
print "Downloading %s..." % url
r = requests.get(url)
if r.status_code != 200:
msg = "Error Downloading file!"
raise Exception(msg)
# For some reason the quakeml file is escaped HTML.
h = HTMLParser.HTMLParser()
data = h.unescape(r.content)
# Replace some XML tags.
data = data.replace("long-period body waves", "body waves")
data = data.replace("intermediate-period surface waves", "surface waves")
data = data.replace("long-period mantle waves", "mantle waves")
data = data.replace("<html><body><pre>", "")
data = data.replace("</pre></body></html>", "")
# Change the resource identifiers. Colons are not allowed in QuakeML.
pattern = r"(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})\.(\d{6})"
data = re.sub(pattern, r"\1-\2-\3T\4-\5-\6.\7", data)
data = StringIO(data)
try:
cat = readEvents(data)
except:
msg = "Could not read downloaded event data"
raise ValueError(msg)
# Parse the event, and use only one origin, magnitude and focal mechanism.
# Only the first event is used. Should not be a problem for the chosen
# global cmt application.
ev = cat[0]
if ev.preferred_origin():
ev.origins = [ev.preferred_origin()]
else:
ev.origins = [ev.origins[0]]
if ev.preferred_focal_mechanism():
ev.focal_mechanisms = [ev.preferred_focal_mechanism()]
else:
ev.focal_mechanisms = [ev.focal_mechanisms[0]]
try:
mt = ev.focal_mechanisms[0].moment_tensor
except:
msg = "No moment tensor found in file."
raise ValueError
seismic_moment_in_dyn_cm = mt.scalar_moment
if not seismic_moment_in_dyn_cm:
msg = "No scalar moment found in file."
raise ValueError(msg)
# Create a new magnitude object with the moment magnitude calculated from
# the given seismic moment.
mag = Magnitude()
mag.magnitude_type = "Mw"
mag.origin_id = ev.origins[0].resource_id
# This is the formula given on the GCMT homepage.
mag.mag = (2.0 / 3.0) * (math.log10(seismic_moment_in_dyn_cm) - 16.1)
mag.resource_id = ev.origins[0].resource_id.resource_id.replace("Origin",
"Magnitude")
ev.magnitudes = [mag]
ev.preferred_magnitude_id = mag.resource_id
# Convert the depth to meters.
org = ev.origins[0]
org.depth *= 1000.0
if org.depth_errors.uncertainty:
org.depth_errors.uncertainty *= 1000.0
# Ugly asserts -- this is just a simple script.
assert(len(ev.magnitudes) == 1)
assert(len(ev.origins) == 1)
assert(len(ev.focal_mechanisms) == 1)
# All values given in the QuakeML file are given in dyne * cm. Convert them
# to N * m.
for key, value in mt.tensor.iteritems():
if key.startswith("m_") and len(key) == 4:
mt.tensor[key] /= 1E7
if key.endswith("_errors") and hasattr(value, "uncertainty"):
mt.tensor[key].uncertainty /= 1E7
mt.scalar_moment /= 1E7
if mt.scalar_moment_errors.uncertainty:
mt.scalar_moment_errors.uncertainty /= 1E7
p_axes = ev.focal_mechanisms[0].principal_axes
for ax in [p_axes.t_axis, p_axes.p_axis, p_axes.n_axis]:
if ax is None or not ax.length:
continue
ax.length /= 1E7
# Check if it has a source time function
stf = mt.source_time_function
if stf:
if stf.type != "triangle":
msg = ("Source time function type '%s' not yet mapped. Please "
"contact the developers.") % stf.type
raise NotImplementedError(msg)
if not stf.duration:
if not stf.decay_time:
msg = "Not known how to derive duration without decay time."
raise NotImplementedError(msg)
# Approximate the duraction for triangular STF.
stf.duration = 2 * stf.decay_time
# Get the flinn_engdahl region for a nice name.
fe = FlinnEngdahl()
region_name = fe.get_region(ev.origins[0].longitude,
ev.origins[0].latitude)
region_name = region_name.replace(" ", "_")
event_name = "GCMT_event_%s_Mag_%.1f_%s-%s-%s-%s-%s.xml" % \
(region_name, ev.magnitudes[0].mag, ev.origins[0].time.year,
ev.origins[0].time.month, ev.origins[0].time.day,
ev.origins[0].time.hour, ev.origins[0].time.minute)
# Check if the ids of the magnitude and origin contain the corresponding
# tag. Otherwise replace tme.
ev.origins[0].resource_id = ev.origins[0].resource_id.resource_id.replace(
"quakeml/gcmtid", "quakeml/origin/gcmtid")
ev.magnitudes[0].resource_id = \
ev.magnitudes[0].resource_id.resource_id.replace(
"quakeml/gcmtid", "quakeml/magnitude/gcmtid")
# Fix up the moment tensor resource_ids.
mt.derived_origin_id = ev.origins[0].resource_id
mt.resource_id = mt.resource_id.resource_id.replace("focalmechanism",
"momenttensor")
cat = Catalog()
cat.resource_id = ev.origins[0].resource_id.resource_id.replace("origin",
"event_parameters")
cat.append(ev)
if output_folder:
event_name = os.path.join(output_folder, event_name)
cat.write(event_name, format="quakeml", validate=True)
print "Written file", event_name
def calculate_moment_magnitudes(cat, output_file):
"""
:param cat: obspy.core.event.Catalog object.
"""
Mws = []
Mls = []
Mws_std = []
for event in cat:
if not event.origins:
print "No origin for event %s" % event.resource_id
continue
if not event.magnitudes:
print "No magnitude for event %s" % event.resource_id
continue
origin_time = event.origins[0].time
local_magnitude = event.magnitudes[0].mag
#if local_magnitude < 1.0:
#continue
moments = []
source_radii = []
corner_frequencies = []
for pick in event.picks:
# Only p phase picks.
if pick.phase_hint.lower() == "p":
radiation_pattern = 0.52
velocity = V_P
k = 0.32
elif pick.phase_hint.lower() == "s":
radiation_pattern = 0.63
velocity = V_S
k = 0.21
else:
continue
distance = (pick.time - origin_time) * velocity
if distance <= 0.0:
continue
stream = get_corresponding_stream(pick.waveform_id, pick.time,
PADDING)
if stream is None or len(stream) != 3:
continue
omegas = []
corner_freqs = []
for trace in stream:
# Get the index of the pick.
pick_index = int(round((pick.time - trace.stats.starttime) / \
trace.stats.delta))
# Choose date window 0.5 seconds before and 1 second after pick.
data_window = trace.data[pick_index - \
int(TIME_BEFORE_PICK * trace.stats.sampling_rate): \
pick_index + int(TIME_AFTER_PICK * trace.stats.sampling_rate)]
# Calculate the spectrum.
spec, freq = mtspec.mtspec(data_window, trace.stats.delta, 2)
try:
fit = fit_spectrum(spec, freq, pick.time - origin_time,
spec.max(), 10.0)
except:
continue
if fit is None:
continue
Omega_0, f_c, err, _ = fit
Omega_0 = np.sqrt(Omega_0)
omegas.append(Omega_0)
corner_freqs.append(f_c)
M_0 = 4.0 * np.pi * DENSITY * velocity ** 3 * distance * \
np.sqrt(omegas[0] ** 2 + omegas[1] ** 2 + omegas[2] ** 2) / \
radiation_pattern
r = 3 * k * V_S / sum(corner_freqs)
moments.append(M_0)
source_radii.append(r)
corner_frequencies.extend(corner_freqs)
if not len(moments):
print "No moments could be calculated for event %s" % \
event.resource_id.resource_id
continue
# Calculate the seismic moment via basic statistics.
moments = np.array(moments)
moment = moments.mean()
moment_std = moments.std()
corner_frequencies = np.array(corner_frequencies)
corner_frequency = corner_frequencies.mean()
corner_frequency_std = corner_frequencies.std()
# Calculate the source radius.
source_radii = np.array(source_radii)
source_radius = source_radii.mean()
source_radius_std = source_radii.std()
# Calculate the stress drop of the event based on the average moment and
# source radii.
stress_drop = (7 * moment) / (16 * source_radius ** 3)
stress_drop_std = np.sqrt((stress_drop ** 2) * \
(((moment_std ** 2) / (moment ** 2)) + \
(9 * source_radius * source_radius_std ** 2)))
if source_radius > 0 and source_radius_std < source_radius:
print "Source radius:", source_radius, " Std:", source_radius_std
print "Stress drop:", stress_drop / 1E5, " Std:", stress_drop_std / 1E5
Mw = 2.0 / 3.0 * (np.log10(moment) - 9.1)
Mw_std = 2.0 / 3.0 * moment_std / (moment * np.log(10))
Mws_std.append(Mw_std)
Mws.append(Mw)
Mls.append(local_magnitude)
calc_diff = abs(Mw - local_magnitude)
Mw = ("%.3f" % Mw).rjust(7)
Ml = ("%.3f" % local_magnitude).rjust(7)
diff = ("%.3e" % calc_diff).rjust(7)
ret_string = colorama.Fore.GREEN + \
"For event %s: Ml=%s | Mw=%s | " % (event.resource_id.resource_id,
Ml, Mw)
if calc_diff >= 1.0:
ret_string += colorama.Fore.RED
ret_string += "Diff=%s" % diff
ret_string += colorama.Fore.GREEN
ret_string += " | Determined at %i stations" % len(moments)
ret_string += colorama.Style.RESET_ALL
print ret_string
mag = Magnitude()
mag.mag = Mw
mag.mag_errors.uncertainty = Mw_std
mag.magnitude_type = "Mw"
mag.origin_id = event.origins[0].resource_id
mag.method_id = "Custom fit to Boatwright spectrum"
mag.station_count = len(moments)
mag.evaluation_mode = "automatic"
mag.evaluation_status = "preliminary"
mag.comments.append(Comment( \
"Seismic Moment=%e Nm; standard deviation=%e" % (moment,
moment_std)))
if source_radius > 0 and source_radius_std < source_radius:
mag.comments.append(Comment( \
"Source radius=%.2fm; standard deviation=%.2f" % (source_radius,
source_radius_std)))
event.magnitudes.append(mag)
print "Writing output file..."
cat.write(output_file, format="quakeml")
def _parseRecordE(self, line, event):
"""
Parses the 'error and magnitude' record E
"""
orig_time_stderr = self._float(line[2:7])
latitude_stderr = self._float(line[8:14])
longitude_stderr = self._float(line[15:21])
depth_stderr = self._float(line[22:27])
mb_mag = self._float(line[28:31])
mb_nsta = self._int(line[32:35])
Ms_mag = self._float(line[36:39])
Ms_nsta = self._int(line[39:42])
mag1 = self._float(line[42:45])
mag1_type = line[45:47]
mag1_source_code = line[47:51].strip()
mag2 = self._float(line[51:54])
mag2_type = line[54:56]
mag2_source_code = line[56:60].strip()
evid = event.resource_id.id.split("/")[-1]
origin = event.origins[0]
self._storeUncertainty(origin.time_errors, orig_time_stderr)
self._storeUncertainty(origin.latitude_errors, self._latErrToDeg(latitude_stderr))
self._storeUncertainty(origin.longitude_errors, self._lonErrToDeg(longitude_stderr, origin.latitude))
self._storeUncertainty(origin.depth_errors, depth_stderr, scale=1000)
if mb_mag is not None:
mag = Magnitude()
res_id = "/".join((res_id_prefix, "magnitude", evid, "mb"))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id="USGS-NEIC")
mag.mag = mb_mag
mag.magnitude_type = "Mb"
mag.station_count = mb_nsta
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if Ms_mag is not None:
mag = Magnitude()
res_id = "/".join((res_id_prefix, "magnitude", evid, "ms"))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id="USGS-NEIC")
mag.mag = Ms_mag
mag.magnitude_type = "Ms"
mag.station_count = Ms_nsta
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag1 is not None:
mag = Magnitude()
mag1_id = mag1_type.lower()
res_id = "/".join((res_id_prefix, "magnitude", evid, mag1_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id=mag1_source_code)
mag.mag = mag1
mag.magnitude_type = mag1_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag2 is not None:
mag = Magnitude()
mag2_id = mag2_type.lower()
if mag2_id == mag1_id:
mag2_id += "2"
res_id = "/".join((res_id_prefix, "magnitude", evid, mag2_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id=mag2_source_code)
mag.mag = mag2
mag.magnitude_type = mag2_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
def _parseRecordE(self, line, event):
"""
Parses the 'error and magnitude' record E
"""
orig_time_stderr = self._float(line[2:7])
latitude_stderr = self._float(line[8:14])
longitude_stderr = self._float(line[15:21])
depth_stderr = self._float(line[22:27])
mb_mag = self._float(line[28:31])
mb_nsta = self._int(line[32:35])
Ms_mag = self._float(line[36:39])
Ms_nsta = self._int(line[39:42])
mag1 = self._float(line[42:45])
mag1_type = line[45:47]
mag1_source_code = line[47:51].strip()
mag2 = self._float(line[51:54])
mag2_type = line[54:56]
mag2_source_code = line[56:60].strip()
evid = event.resource_id.id.split('/')[-1]
origin = event.origins[0]
self._storeUncertainty(origin.time_errors, orig_time_stderr)
self._storeUncertainty(origin.latitude_errors,
self._latErrToDeg(latitude_stderr))
self._storeUncertainty(
origin.longitude_errors,
self._lonErrToDeg(longitude_stderr, origin.latitude))
self._storeUncertainty(origin.depth_errors, depth_stderr, scale=1000)
if mb_mag is not None:
mag = Magnitude()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, 'mb'))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id='USGS-NEIC')
mag.mag = mb_mag
mag.magnitude_type = 'Mb'
mag.station_count = mb_nsta
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if Ms_mag is not None:
mag = Magnitude()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, 'ms'))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id='USGS-NEIC')
mag.mag = Ms_mag
mag.magnitude_type = 'Ms'
mag.station_count = Ms_nsta
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag1 is not None:
mag = Magnitude()
mag1_id = mag1_type.lower()
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag1_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id=mag1_source_code)
mag.mag = mag1
mag.magnitude_type = mag1_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
if mag2 is not None:
mag = Magnitude()
mag2_id = mag2_type.lower()
if mag2_id == mag1_id:
mag2_id += '2'
res_id = '/'.join((res_id_prefix, 'magnitude', evid, mag2_id))
mag.resource_id = ResourceIdentifier(id=res_id)
mag.creation_info = CreationInfo(agency_id=mag2_source_code)
mag.mag = mag2
mag.magnitude_type = mag2_type
mag.origin_id = origin.resource_id
event.magnitudes.append(mag)
def calculate_moment_magnitudes(cat, output_file):
"""
:param cat: obspy.core.event.Catalog object.
"""
Mws = []
Mls = []
Mws_std = []
for event in cat:
if not event.origins:
print "No origin for event %s" % event.resource_id
continue
if not event.magnitudes:
print "No magnitude for event %s" % event.resource_id
continue
origin_time = event.origins[0].time
local_magnitude = event.magnitudes[0].mag
#if local_magnitude < 1.0:
#continue
moments = []
source_radii = []
corner_frequencies = []
for pick in event.picks:
# Only p phase picks.
if pick.phase_hint.lower() == "p":
radiation_pattern = 0.52
velocity = V_P
k = 0.32
elif pick.phase_hint.lower() == "s":
radiation_pattern = 0.63
velocity = V_S
k = 0.21
else:
continue
distance = (pick.time - origin_time) * velocity
if distance <= 0.0:
continue
stream = get_corresponding_stream(pick.waveform_id, pick.time,
PADDING)
if stream is None or len(stream) != 3:
continue
omegas = []
corner_freqs = []
for trace in stream:
# Get the index of the pick.
pick_index = int(round((pick.time - trace.stats.starttime) / \
trace.stats.delta))
# Choose date window 0.5 seconds before and 1 second after pick.
data_window = trace.data[pick_index - \
int(TIME_BEFORE_PICK * trace.stats.sampling_rate): \
pick_index + int(TIME_AFTER_PICK * trace.stats.sampling_rate)]
# Calculate the spectrum.
spec, freq = mtspec.mtspec(data_window, trace.stats.delta, 2)
try:
fit = fit_spectrum(spec, freq, pick.time - origin_time,
spec.max(), 10.0)
except:
continue
if fit is None:
continue
Omega_0, f_c, err, _ = fit
Omega_0 = np.sqrt(Omega_0)
omegas.append(Omega_0)
corner_freqs.append(f_c)
M_0 = 4.0 * np.pi * DENSITY * velocity ** 3 * distance * \
np.sqrt(omegas[0] ** 2 + omegas[1] ** 2 + omegas[2] ** 2) / \
radiation_pattern
r = 3 * k * V_S / sum(corner_freqs)
moments.append(M_0)
source_radii.append(r)
corner_frequencies.extend(corner_freqs)
if not len(moments):
print "No moments could be calculated for event %s" % \
event.resource_id.resource_id
continue
# Calculate the seismic moment via basic statistics.
moments = np.array(moments)
moment = moments.mean()
moment_std = moments.std()
corner_frequencies = np.array(corner_frequencies)
corner_frequency = corner_frequencies.mean()
corner_frequency_std = corner_frequencies.std()
# Calculate the source radius.
source_radii = np.array(source_radii)
source_radius = source_radii.mean()
source_radius_std = source_radii.std()
# Calculate the stress drop of the event based on the average moment and
# source radii.
stress_drop = (7 * moment) / (16 * source_radius ** 3)
stress_drop_std = np.sqrt((stress_drop ** 2) * \
(((moment_std ** 2) / (moment ** 2)) + \
(9 * source_radius * source_radius_std ** 2)))
if source_radius > 0 and source_radius_std < source_radius:
print "Source radius:", source_radius, " Std:", source_radius_std
print "Stress drop:", stress_drop / 1E5, " Std:", stress_drop_std / 1E5
Mw = 2.0 / 3.0 * (np.log10(moment) - 9.1)
Mw_std = 2.0 / 3.0 * moment_std / (moment * np.log(10))
Mws_std.append(Mw_std)
Mws.append(Mw)
Mls.append(local_magnitude)
calc_diff = abs(Mw - local_magnitude)
Mw = ("%.3f" % Mw).rjust(7)
Ml = ("%.3f" % local_magnitude).rjust(7)
diff = ("%.3e" % calc_diff).rjust(7)
ret_string = colorama.Fore.GREEN + \
"For event %s: Ml=%s | Mw=%s | " % (event.resource_id.resource_id,
Ml, Mw)
if calc_diff >= 1.0:
ret_string += colorama.Fore.RED
ret_string += "Diff=%s" % diff
ret_string += colorama.Fore.GREEN
ret_string += " | Determined at %i stations" % len(moments)
ret_string += colorama.Style.RESET_ALL
print ret_string
mag = Magnitude()
mag.mag = Mw
mag.mag_errors.uncertainty = Mw_std
mag.magnitude_type = "Mw"
mag.origin_id = event.origins[0].resource_id
mag.method_id = "smi:com.github/krischer/moment_magnitude_calculator/automatic/1"
mag.station_count = len(moments)
mag.evaluation_mode = "automatic"
mag.evaluation_status = "preliminary"
mag.comments.append(Comment( \
"Seismic Moment=%e Nm; standard deviation=%e" % (moment,
moment_std)))
mag.comments.append(Comment("Custom fit to Boatwright spectrum"))
if source_radius > 0 and source_radius_std < source_radius:
mag.comments.append(Comment( \
"Source radius=%.2fm; standard deviation=%.2f" % (source_radius,
source_radius_std)))
event.magnitudes.append(mag)
print "Writing output file..."
cat.write(output_file, format="quakeml")
def iris2quakeml(url, output_folder=None):
if not "/spudservice/" in url:
url = url.replace("/spud/", "/spudservice/")
if url.endswith("/"):
url += "quakeml"
else:
url += "/quakeml"
print "Downloading %s..." % url
r = requests.get(url)
if r.status_code != 200:
msg = "Error Downloading file!"
raise Exception(msg)
# For some reason the quakeml file is escaped HTML.
h = HTMLParser.HTMLParser()
data = h.unescape(r.content)
# Replace some XML tags.
data = data.replace("long-period body waves", "body waves")
data = data.replace("intermediate-period surface waves", "surface waves")
data = data.replace("long-period mantle waves", "mantle waves")
data = data.replace("<html><body><pre>", "")
data = data.replace("</pre></body></html>", "")
# Change the resource identifiers. Colons are not allowed in QuakeML.
pattern = r"(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})\.(\d{6})"
data = re.sub(pattern, r"\1-\2-\3T\4-\5-\6.\7", data)
data = StringIO(data)
try:
cat = readEvents(data)
except:
msg = "Could not read downloaded event data"
raise ValueError(msg)
# Parse the event, and use only one origin, magnitude and focal mechanism.
# Only the first event is used. Should not be a problem for the chosen
# global cmt application.
ev = cat[0]
if ev.preferred_origin():
ev.origins = [ev.preferred_origin()]
else:
ev.origins = [ev.origins[0]]
if ev.preferred_focal_mechanism():
ev.focal_mechanisms = [ev.preferred_focal_mechanism()]
else:
ev.focal_mechanisms = [ev.focal_mechanisms[0]]
try:
mt = ev.focal_mechanisms[0].moment_tensor
except:
msg = "No moment tensor found in file."
raise ValueError
seismic_moment_in_dyn_cm = mt.scalar_moment
if not seismic_moment_in_dyn_cm:
msg = "No scalar moment found in file."
raise ValueError(msg)
# Create a new magnitude object with the moment magnitude calculated from
# the given seismic moment.
mag = Magnitude()
mag.magnitude_type = "Mw"
mag.origin_id = ev.origins[0].resource_id
# This is the formula given on the GCMT homepage.
mag.mag = (2.0 / 3.0) * (math.log10(seismic_moment_in_dyn_cm) - 16.1)
mag.resource_id = ev.origins[0].resource_id.resource_id.replace(
"Origin", "Magnitude")
ev.magnitudes = [mag]
ev.preferred_magnitude_id = mag.resource_id
# Convert the depth to meters.
org = ev.origins[0]
org.depth *= 1000.0
if org.depth_errors.uncertainty:
org.depth_errors.uncertainty *= 1000.0
# Ugly asserts -- this is just a simple script.
assert (len(ev.magnitudes) == 1)
assert (len(ev.origins) == 1)
assert (len(ev.focal_mechanisms) == 1)
# All values given in the QuakeML file are given in dyne * cm. Convert them
# to N * m.
for key, value in mt.tensor.iteritems():
if key.startswith("m_") and len(key) == 4:
mt.tensor[key] /= 1E7
if key.endswith("_errors") and hasattr(value, "uncertainty"):
mt.tensor[key].uncertainty /= 1E7
mt.scalar_moment /= 1E7
if mt.scalar_moment_errors.uncertainty:
mt.scalar_moment_errors.uncertainty /= 1E7
p_axes = ev.focal_mechanisms[0].principal_axes
for ax in [p_axes.t_axis, p_axes.p_axis, p_axes.n_axis]:
if ax is None or not ax.length:
continue
ax.length /= 1E7
# Check if it has a source time function
stf = mt.source_time_function
if stf:
if stf.type != "triangle":
msg = ("Source time function type '%s' not yet mapped. Please "
"contact the developers.") % stf.type
raise NotImplementedError(msg)
if not stf.duration:
if not stf.decay_time:
msg = "Not known how to derive duration without decay time."
raise NotImplementedError(msg)
# Approximate the duraction for triangular STF.
stf.duration = 2 * stf.decay_time
# Get the flinn_engdahl region for a nice name.
fe = FlinnEngdahl()
region_name = fe.get_region(ev.origins[0].longitude,
ev.origins[0].latitude)
region_name = region_name.replace(" ", "_")
event_name = "GCMT_event_%s_Mag_%.1f_%s-%s-%s-%s-%s.xml" % \
(region_name, ev.magnitudes[0].mag, ev.origins[0].time.year,
ev.origins[0].time.month, ev.origins[0].time.day,
ev.origins[0].time.hour, ev.origins[0].time.minute)
# Check if the ids of the magnitude and origin contain the corresponding
# tag. Otherwise replace tme.
ev.origins[0].resource_id = ev.origins[0].resource_id.resource_id.replace(
"quakeml/gcmtid", "quakeml/origin/gcmtid")
ev.magnitudes[0].resource_id = \
ev.magnitudes[0].resource_id.resource_id.replace(
"quakeml/gcmtid", "quakeml/magnitude/gcmtid")
# Fix up the moment tensor resource_ids.
mt.derived_origin_id = ev.origins[0].resource_id
mt.resource_id = mt.resource_id.resource_id.replace(
"focalmechanism", "momenttensor")
cat = Catalog()
cat.resource_id = ev.origins[0].resource_id.resource_id.replace(
"origin", "event_parameters")
cat.append(ev)
if output_folder:
event_name = os.path.join(output_folder, event_name)
cat.write(event_name, format="quakeml", validate=True)
print "Written file", event_name
