def _parseRecordDa(self, line, focal_mechanism):
"""
Parses the 'source parameter data - principal axes and
nodal planes' record Da
"""
exponent = self._intZero(line[3:5])
scale = math.pow(10, exponent)
t_axis_len = self._floatWithFormat(line[5:9], '4.2', scale)
t_axis_stderr = self._floatWithFormat(line[9:12], '3.2', scale)
t_axis_plunge = self._int(line[12:14])
t_axis_azimuth = self._int(line[14:17])
n_axis_len = self._floatWithFormat(line[17:21], '4.2', scale)
n_axis_stderr = self._floatWithFormat(line[21:24], '3.2', scale)
n_axis_plunge = self._int(line[24:26])
n_axis_azimuth = self._int(line[26:29])
p_axis_len = self._floatWithFormat(line[29:33], '4.2', scale)
p_axis_stderr = self._floatWithFormat(line[33:36], '3.2', scale)
p_axis_plunge = self._int(line[36:38])
p_axis_azimuth = self._int(line[38:41])
np1_strike = self._int(line[42:45])
np1_dip = self._int(line[45:47])
np1_slip = self._int(line[47:51])
np2_strike = self._int(line[51:54])
np2_dip = self._int(line[54:56])
np2_slip = self._int(line[56:60])
t_axis = Axis()
t_axis.length = t_axis_len
self._storeUncertainty(t_axis.length_errors, t_axis_stderr)
t_axis.plunge = t_axis_plunge
t_axis.azimuth = t_axis_azimuth
n_axis = Axis()
n_axis.length = n_axis_len
self._storeUncertainty(n_axis.length_errors, n_axis_stderr)
n_axis.plunge = n_axis_plunge
n_axis.azimuth = n_axis_azimuth
p_axis = Axis()
p_axis.length = p_axis_len
self._storeUncertainty(p_axis.length_errors, p_axis_stderr)
p_axis.plunge = p_axis_plunge
p_axis.azimuth = p_axis_azimuth
principal_axes = PrincipalAxes()
principal_axes.t_axis = t_axis
principal_axes.n_axis = n_axis
principal_axes.p_axis = p_axis
focal_mechanism.principal_axes = principal_axes
nodal_plane_1 = NodalPlane()
nodal_plane_1.strike = np1_strike
nodal_plane_1.dip = np1_dip
nodal_plane_1.rake = np1_slip
nodal_plane_2 = NodalPlane()
nodal_plane_2.strike = np2_strike
nodal_plane_2.dip = np2_dip
nodal_plane_2.rake = np2_slip
nodal_planes = NodalPlanes()
nodal_planes.nodal_plane_1 = nodal_plane_1
nodal_planes.nodal_plane_2 = nodal_plane_2
focal_mechanism.nodal_planes = nodal_planes
def _parse_record_da(self, line, focal_mechanism):
"""
Parses the 'source parameter data - principal axes and
nodal planes' record Da
"""
exponent = self._int_zero(line[3:5])
scale = math.pow(10, exponent)
t_axis_len = self._float_with_format(line[5:9], '4.2', scale)
t_axis_stderr = self._float_with_format(line[9:12], '3.2', scale)
t_axis_plunge = self._int(line[12:14])
t_axis_azimuth = self._int(line[14:17])
n_axis_len = self._float_with_format(line[17:21], '4.2', scale)
n_axis_stderr = self._float_with_format(line[21:24], '3.2', scale)
n_axis_plunge = self._int(line[24:26])
n_axis_azimuth = self._int(line[26:29])
p_axis_len = self._float_with_format(line[29:33], '4.2', scale)
p_axis_stderr = self._float_with_format(line[33:36], '3.2', scale)
p_axis_plunge = self._int(line[36:38])
p_axis_azimuth = self._int(line[38:41])
np1_strike = self._int(line[42:45])
np1_dip = self._int(line[45:47])
np1_slip = self._int(line[47:51])
np2_strike = self._int(line[51:54])
np2_dip = self._int(line[54:56])
np2_slip = self._int(line[56:60])
t_axis = Axis()
t_axis.length = t_axis_len
self._store_uncertainty(t_axis.length_errors, t_axis_stderr)
t_axis.plunge = t_axis_plunge
t_axis.azimuth = t_axis_azimuth
n_axis = Axis()
n_axis.length = n_axis_len
self._store_uncertainty(n_axis.length_errors, n_axis_stderr)
n_axis.plunge = n_axis_plunge
n_axis.azimuth = n_axis_azimuth
p_axis = Axis()
p_axis.length = p_axis_len
self._store_uncertainty(p_axis.length_errors, p_axis_stderr)
p_axis.plunge = p_axis_plunge
p_axis.azimuth = p_axis_azimuth
principal_axes = PrincipalAxes()
principal_axes.t_axis = t_axis
principal_axes.n_axis = n_axis
principal_axes.p_axis = p_axis
focal_mechanism.principal_axes = principal_axes
nodal_plane_1 = NodalPlane()
nodal_plane_1.strike = np1_strike
nodal_plane_1.dip = np1_dip
nodal_plane_1.rake = np1_slip
nodal_plane_2 = NodalPlane()
nodal_plane_2.strike = np2_strike
nodal_plane_2.dip = np2_dip
nodal_plane_2.rake = np2_slip
nodal_planes = NodalPlanes()
nodal_planes.nodal_plane_1 = nodal_plane_1
nodal_planes.nodal_plane_2 = nodal_plane_2
focal_mechanism.nodal_planes = nodal_planes
def _map_fplane2focalmech(self, db):
"""
Return an obspy FocalMechanism from an dict of CSS key/values
corresponding to one record. See the 'Join' section for the implied
database join expected.
Inputs
======
db : dict of key/values of CSS fields from the 'fplane' table
Returns
=======
obspy.core.event.FocalMechanism
Notes
=====
Any object that supports the dict 'get' method can be passed as
input, e.g. OrderedDict, custom classes, etc.
"""
#
# NOTE: Antelope schema for this is wrong, no nulls defined
#
fm = FocalMechanism()
nps = NodalPlanes()
nps.nodal_plane_1 = NodalPlane(db.get('str1'), db.get('dip1'), db.get('rake1'))
nps.nodal_plane_2 = NodalPlane(db.get('str2'), db.get('dip2'), db.get('rake2'))
nps.preferred_plane = 1
prin_ax = PrincipalAxes()
prin_ax.t_axis = Axis(db.get('taxazm'),db.get('taxplg'))
prin_ax.p_axis = Axis(db.get('paxazm'),db.get('paxplg'))
fm.nodal_planes = nps
fm.principal_axes = prin_ax
author_string = ':'.join([db['algorithm'], db['auth']])
fm.creation_info = CreationInfo(
version = db.get('mechid'),
creation_time = UTCDateTime(db['lddate']),
agency_id = self.agency,
author = author_string,
)
fm.resource_id = self._rid(fm)
return fm
def __toFocalMechanism(parser, focmec_el):
"""
"""
global CURRENT_TYPE
focmec = FocalMechanism()
focmec.resource_id = ResourceIdentifier(
prefix="/".join([RESOURCE_ROOT, "focal_mechanism"]))
if CURRENT_TYPE == "obspyck":
focmec.method_id = "%s/focal_mechanism_method/focmec/1" % RESOURCE_ROOT
else:
focmec.method_id = "%s/focal_mechanism_method/%s/1" % (
RESOURCE_ROOT, parser.xpath2obj('program', focmec_el))
if str(focmec.method_id).lower().endswith("none"):
focmec.method_id = None
focmec.station_polarity_count = parser.xpath2obj("stationPolarityCount",
focmec_el, int)
if focmec.station_polarity_count:
focmec.misfit = parser.xpath2obj("stationPolarityErrorCount",
focmec_el, int) / float(
focmec.station_polarity_count)
focmec.nodal_planes = NodalPlanes()
focmec.nodal_planes.nodal_plane_1 = NodalPlane()
nodal_plane = focmec_el.find("nodalPlanes")
if nodal_plane is None or not len(nodal_plane):
return None
n_p = focmec.nodal_planes.nodal_plane_1
# There is always only one nodal plane, called nodalPlane1
n_p.strike, strike_uncertainty = __toFloatQuantity(
parser, focmec_el, "nodalPlanes/nodalPlane1/strike")
n_p.dip, dip_uncertainty = __toFloatQuantity(
parser, focmec_el, "nodalPlanes/nodalPlane1/dip")
n_p.rake, rake_uncertainty = __toFloatQuantity(
parser, focmec_el, "nodalPlanes/nodalPlane1/rake")
if hasattr(strike_uncertainty, "uncertainty"):
n_p.strike_errors.uncertainty = strike_uncertainty["uncertainty"]
if hasattr(dip_uncertainty, "uncertainty"):
n_p.dip_errors.uncertainty = dip_uncertainty["uncertainty"]
if hasattr(rake_uncertainty, "uncertainty"):
n_p.rake_errors.uncertainty = rake_uncertainty["uncertainty"]
solution_count = parser.xpath2obj("possibleSolutionCount", focmec_el, int)
if solution_count:
focmec.comments.append(
Comment(force_resource_id=False,
resource_id=None,
text="Possible Solution Count: %i" % solution_count))
return focmec
def _read_focmec_out(lines):
"""
Read given data into an :class:`~obspy.core.event.Event` object.
:type lines: list
:param lines: List of decoded unicode strings with data from a FOCMEC out
file.
"""
event, _ = _read_common_header(lines)
# now move to first line with a focal mechanism
for i, line in enumerate(lines):
if line.split()[:3] == ['Dip', 'Strike', 'Rake']:
break
else:
return event
header = lines[:i]
polarity_count, weighted = _get_polarity_count(header)
focmec_list_header = lines[i]
event.comments.append(Comment(text='\n'.join(header)))
try:
lines = lines[i + 1:]
except IndexError:
return event
for line in lines:
# allow for empty lines (maybe they can happen at the end sometimes..)
if not line.strip():
continue
comment = Comment(text='\n'.join((focmec_list_header, line)))
items = line.split()
dip, strike, rake = [float(x) for x in items[:3]]
plane = NodalPlane(strike=strike, dip=dip, rake=rake)
planes = NodalPlanes(nodal_plane_1=plane, preferred_plane=1)
# XXX ideally should compute the auxilliary plane..
focmec = FocalMechanism(nodal_planes=planes)
focmec.station_polarity_count = polarity_count
focmec.creation_info = CreationInfo(
version='FOCMEC', creation_time=event.creation_info.creation_time)
if not weighted:
errors = sum([int(x) for x in items[3:6]])
focmec.misfit = float(errors) / polarity_count
focmec.comments.append(comment)
event.focal_mechanisms.append(focmec)
return event
def _read_focmec_lst_one_block(lines, polarity_count=None):
comment = Comment(text='\n'.join(lines))
while lines and not lines[0].lstrip().startswith('Dip,Strike,Rake'):
lines.pop(0)
# the last block does not contain a focmec but only a short comment how
# many solutions there were overall, so we hit a block that will not have
# the above line and we exhaust the lines list
if not lines:
return None, []
dip, strike, rake = [float(x) for x in lines[0].split()[1:4]]
plane1 = NodalPlane(strike=strike, dip=dip, rake=rake)
lines.pop(0)
dip, strike, rake = [float(x) for x in lines[0].split()[1:4]]
plane2 = NodalPlane(strike=strike, dip=dip, rake=rake)
planes = NodalPlanes(nodal_plane_1=plane1, nodal_plane_2=plane2,
preferred_plane=1)
focmec = FocalMechanism(nodal_planes=planes)
focmec.comments.append(comment)
if polarity_count is not None:
polarity_errors = _get_polarity_error_count_lst_block(lines)
focmec.station_polarity_count = polarity_count
focmec.misfit = float(polarity_errors) / polarity_count
return focmec, lines
def _read_ndk(filename, *args, **kwargs): # @UnusedVariable
"""
Reads an NDK file to a :class:`~obspy.core.event.Catalog` object.
:param filename: File or file-like object in text mode.
"""
# Read the whole file at once. While an iterator would be more efficient
# the largest NDK file out in the wild is 13.7 MB so it does not matter
# much.
if not hasattr(filename, "read"):
# Check if it exists, otherwise assume its a string.
try:
with open(filename, "rt") as fh:
data = fh.read()
except Exception:
try:
data = filename.decode()
except Exception:
data = str(filename)
data = data.strip()
else:
data = filename.read()
if hasattr(data, "decode"):
data = data.decode()
# Create iterator that yields lines.
def lines_iter():
prev_line = -1
while True:
next_line = data.find("\n", prev_line + 1)
if next_line < 0:
break
yield data[prev_line + 1:next_line]
prev_line = next_line
if len(data) > prev_line + 1:
yield data[prev_line + 1:]
# Use one Flinn Engdahl object for all region determinations.
fe = FlinnEngdahl()
cat = Catalog(resource_id=_get_resource_id("catalog", str(uuid.uuid4())))
# Loop over 5 lines at once.
for _i, lines in enumerate(zip_longest(*[lines_iter()] * 5)):
if None in lines:
msg = "Skipped last %i lines. Not a multiple of 5 lines." % (
lines.count(None))
warnings.warn(msg, ObsPyNDKWarning)
continue
# Parse the lines to a human readable dictionary.
try:
record = _read_lines(*lines)
except (ValueError, ObsPyNDKException):
exc = traceback.format_exc()
msg = ("Could not parse event %i (faulty file?). Will be "
"skipped. Lines of the event:\n"
"\t%s\n"
"%s") % (_i + 1, "\n\t".join(lines), exc)
warnings.warn(msg, ObsPyNDKWarning)
continue
# Use one creation info for essentially every item.
creation_info = CreationInfo(agency_id="GCMT",
version=record["version_code"])
# Use the ObsPy Flinn Engdahl region determiner as the region in the
# NDK files is oftentimes trimmed.
region = fe.get_region(record["centroid_longitude"],
record["centroid_latitude"])
# Create an event object.
event = Event(force_resource_id=False,
event_type="earthquake",
event_type_certainty="known",
event_descriptions=[
EventDescription(text=region,
type="Flinn-Engdahl region"),
EventDescription(text=record["cmt_event_name"],
type="earthquake name")
])
# Assemble the time for the reference origin.
try:
time = _parse_date_time(record["date"], record["time"])
except ObsPyNDKException:
msg = ("Invalid time in event %i. '%s' and '%s' cannot be "
"assembled to a valid time. Event will be skipped.") % \
(_i + 1, record["date"], record["time"])
warnings.warn(msg, ObsPyNDKWarning)
continue
# Create two origins, one with the reference latitude/longitude and
# one with the centroidal values.
ref_origin = Origin(
force_resource_id=False,
time=time,
longitude=record["hypo_lng"],
latitude=record["hypo_lat"],
# Convert to m.
depth=record["hypo_depth_in_km"] * 1000.0,
origin_type="hypocenter",
comments=[
Comment(text="Hypocenter catalog: %s" %
record["hypocenter_reference_catalog"],
force_resource_id=False)
])
ref_origin.comments[0].resource_id = _get_resource_id(
record["cmt_event_name"], "comment", tag="ref_origin")
ref_origin.resource_id = _get_resource_id(record["cmt_event_name"],
"origin",
tag="reforigin")
cmt_origin = Origin(
force_resource_id=False,
longitude=record["centroid_longitude"],
longitude_errors={
"uncertainty": record["centroid_longitude_error"]
},
latitude=record["centroid_latitude"],
latitude_errors={"uncertainty": record["centroid_latitude_error"]},
# Convert to m.
depth=record["centroid_depth_in_km"] * 1000.0,
depth_errors={
"uncertainty": record["centroid_depth_in_km_error"] * 1000
},
time=ref_origin["time"] + record["centroid_time"],
time_errors={"uncertainty": record["centroid_time_error"]},
depth_type=record["type_of_centroid_depth"],
origin_type="centroid",
time_fixed=False,
epicenter_fixed=False,
creation_info=creation_info.copy())
cmt_origin.resource_id = _get_resource_id(record["cmt_event_name"],
"origin",
tag="cmtorigin")
event.origins = [ref_origin, cmt_origin]
event.preferred_origin_id = cmt_origin.resource_id.id
# Create the magnitude object.
mag = Magnitude(force_resource_id=False,
mag=round(record["Mw"], 2),
magnitude_type="Mwc",
origin_id=cmt_origin.resource_id,
creation_info=creation_info.copy())
mag.resource_id = _get_resource_id(record["cmt_event_name"],
"magnitude",
tag="moment_mag")
event.magnitudes = [mag]
event.preferred_magnitude_id = mag.resource_id.id
# Add the reported mb, MS magnitudes as additional magnitude objects.
event.magnitudes.append(
Magnitude(
force_resource_id=False,
mag=record["mb"],
magnitude_type="mb",
comments=[
Comment(
force_resource_id=False,
text="Reported magnitude in NDK file. Most likely 'mb'."
)
]))
event.magnitudes[-1].comments[-1].resource_id = _get_resource_id(
record["cmt_event_name"], "comment", tag="mb_magnitude")
event.magnitudes[-1].resource_id = _get_resource_id(
record["cmt_event_name"], "magnitude", tag="mb")
event.magnitudes.append(
Magnitude(
force_resource_id=False,
mag=record["MS"],
magnitude_type="MS",
comments=[
Comment(
force_resource_id=False,
text="Reported magnitude in NDK file. Most likely 'MS'."
)
]))
event.magnitudes[-1].comments[-1].resource_id = _get_resource_id(
record["cmt_event_name"], "comment", tag="MS_magnitude")
event.magnitudes[-1].resource_id = _get_resource_id(
record["cmt_event_name"], "magnitude", tag="MS")
# Take care of the moment tensor.
tensor = Tensor(m_rr=record["m_rr"],
m_rr_errors={"uncertainty": record["m_rr_error"]},
m_pp=record["m_pp"],
m_pp_errors={"uncertainty": record["m_pp_error"]},
m_tt=record["m_tt"],
m_tt_errors={"uncertainty": record["m_tt_error"]},
m_rt=record["m_rt"],
m_rt_errors={"uncertainty": record["m_rt_error"]},
m_rp=record["m_rp"],
m_rp_errors={"uncertainty": record["m_rp_error"]},
m_tp=record["m_tp"],
m_tp_errors={"uncertainty": record["m_tp_error"]},
creation_info=creation_info.copy())
mt = MomentTensor(
force_resource_id=False,
scalar_moment=record["scalar_moment"],
tensor=tensor,
data_used=[DataUsed(**i) for i in record["data_used"]],
inversion_type=record["source_type"],
source_time_function=SourceTimeFunction(
type=record["moment_rate_type"],
duration=record["moment_rate_duration"]),
derived_origin_id=cmt_origin.resource_id,
creation_info=creation_info.copy())
mt.resource_id = _get_resource_id(record["cmt_event_name"],
"momenttensor")
axis = [Axis(**i) for i in record["principal_axis"]]
focmec = FocalMechanism(
force_resource_id=False,
moment_tensor=mt,
principal_axes=PrincipalAxes(
# The ordering is the same as for the IRIS SPUD service and
# from a website of the Saint Louis University Earthquake
# center so it should be correct.
t_axis=axis[0],
p_axis=axis[2],
n_axis=axis[1]),
nodal_planes=NodalPlanes(
nodal_plane_1=NodalPlane(**record["nodal_plane_1"]),
nodal_plane_2=NodalPlane(**record["nodal_plane_2"])),
comments=[
Comment(force_resource_id=False,
text="CMT Analysis Type: %s" %
record["cmt_type"].capitalize()),
Comment(force_resource_id=False,
text="CMT Timestamp: %s" % record["cmt_timestamp"])
],
creation_info=creation_info.copy())
focmec.comments[0].resource_id = _get_resource_id(
record["cmt_event_name"], "comment", tag="cmt_type")
focmec.comments[1].resource_id = _get_resource_id(
record["cmt_event_name"], "comment", tag="cmt_timestamp")
focmec.resource_id = _get_resource_id(record["cmt_event_name"],
"focal_mechanism")
event.focal_mechanisms = [focmec]
event.preferred_focal_mechanism_id = focmec.resource_id.id
# Set at end to avoid duplicate resource id warning.
event.resource_id = _get_resource_id(record["cmt_event_name"], "event")
cat.append(event)
if len(cat) == 0:
msg = "No valid events found in NDK file."
raise ObsPyNDKException(msg)
return cat
def makeCatalog(StazList, mt, scale, args):
epi = args.epi.rsplit()
model = args.model.split(os.sep)
NrSt = len(StazList)
NrCo = NrSt * 3
(Fmin, Fmax) = getFreq(args)
Tmin = ('%.0f' % (1 / Fmax))
Tmax = ('%.0f' % (1 / Fmin))
mo = ('%.3e' % (mt[0]))
mw = ('%.2f' % (mt[1]))
Pdc = ('%.2f' % (float(mt[2]) / 100))
Pclvd = ('%.2f' % (float(mt[3]) / 100))
Tval = ('%10.3e' % (mt[22]))
Tplg = ('%4.1f' % (mt[23]))
Tazi = ('%5.1f' % (mt[24]))
Nval = ('%10.3e' % (mt[25]))
Nplg = ('%4.1f' % (mt[26]))
Nazi = ('%5.1f' % (mt[27]))
Pval = ('%10.3e' % (mt[28]))
Pplg = ('%4.1f' % (mt[29]))
Pazi = ('%5.1f' % (mt[30]))
STp1 = ('%5.1f' % (mt[31]))
DPp1 = ('%4.1f' % (mt[32]))
RAp1 = ('%6.1f' % (mt[33]))
STp2 = ('%5.1f' % (mt[34]))
DPp2 = ('%4.1f' % (mt[35]))
RAp2 = ('%6.1f' % (mt[36]))
var = ('%.2f' % (mt[37]))
qua = ('%d' % (mt[38]))
mij = [mt[4], mt[5], mt[6], mt[7], mt[8], mt[9]]
mm0 = str('%10.3e' % (mij[0]))
mm1 = str('%10.3e' % (mij[1]))
mm2 = str('%10.3e' % (mij[2]))
mm3 = str('%10.3e' % (mij[3]))
mm4 = str('%10.3e' % (mij[4]))
mm5 = str('%10.3e' % (mij[5]))
# Aki konvention
Mrr = mm5
Mtt = mm0
Mff = mm1
Mrt = mm3
Mrf = mm4
Mtf = mm2
# stress regime
A1 = PrincipalAxis(val=mt[22], dip=mt[23], strike=mt[24])
A2 = PrincipalAxis(val=mt[25], dip=mt[26], strike=mt[27])
A3 = PrincipalAxis(val=mt[28], dip=mt[29], strike=mt[30])
(regime, sh) = stressRegime(A1, A2, A3)
sh = ('%5.1f' % (sh))
#### Build classes #################################
#
#Resource Id is the event origin time for definition
res_id = ResourceIdentifier(args.ori)
nowUTC = datetime.datetime.utcnow()
info = CreationInfo(author="pytdmt", version="2.4", creation_time=nowUTC)
evOrigin = Origin(resource_id=res_id,
time=args.ori,
latitude=epi[0],
longitude=epi[1],
depth=epi[2],
earth_model_id=model[-1],
creation_info=info)
# Magnitudes
magnitude = Magnitude(mag=mw, magnitude_type="Mw")
# Nodal Planes
np1 = NodalPlane(strike=STp1, dip=DPp1, rake=RAp1)
np2 = NodalPlane(strike=STp2, dip=DPp2, rake=RAp2)
planes = NodalPlanes(nodal_plane_1=np1, nodal_plane_2=np2)
# Principal axes
Taxe = Axis(azimuth=Tazi, plunge=Tplg, length=Tval)
Naxe = Axis(azimuth=Nazi, plunge=Nplg, length=Nval)
Paxe = Axis(azimuth=Pazi, plunge=Pplg, length=Pval)
axes = PrincipalAxes(t_axis=Taxe, p_axis=Paxe, n_axis=Naxe)
# MT elements
MT = Tensor(m_rr=Mrr, m_tt=Mtt, m_pp=Mff, m_rt=Mrt, m_rp=Mrf, m_tp=Mtf)
# Stress regime
regStr = 'Stress regime: ' + regime + ' - SH = ' + sh
strDes = EventDescription(regStr)
# MT dataset
dataInfo = DataUsed(wave_type="combined",
station_count=NrSt,
component_count=NrCo,
shortest_period=Tmin,
longest_period=Tmax)
source = MomentTensor(data_used=dataInfo,
scalar_moment=mo,
tensor=MT,
variance_reduction=var,
double_couple=Pdc,
clvd=Pclvd,
iso=0)
focMec = FocalMechanism(moment_tensor=source,
nodal_planes=planes,
principal_axes=axes,
azimuthal_gap=-1)
#Initialize Event Catalog
mtSolution = Event(creation_info=info)
mtSolution.origins.append(evOrigin)
mtSolution.magnitudes.append(magnitude)
mtSolution.focal_mechanisms.append(focMec)
mtSolution.event_descriptions.append(strDes)
cat = Catalog()
cat.append(mtSolution)
return cat
def __read_single_fnetmt_entry(line, **kwargs):
"""
Reads a single F-net moment tensor solution to a
:class:`~obspy.core.event.Event` object.
:param line: String containing moment tensor information.
:type line: str.
"""
a = line.split()
try:
ot = UTCDateTime().strptime(a[0], '%Y/%m/%d,%H:%M:%S.%f')
except ValueError:
ot = UTCDateTime().strptime(a[0], '%Y/%m/%d,%H:%M:%S')
lat, lon, depjma, magjma = map(float, a[1:5])
depjma *= 1000
region = a[5]
strike = tuple(map(int, a[6].split(';')))
dip = tuple(map(int, a[7].split(';')))
rake = tuple(map(int, a[8].split(';')))
mo = float(a[9])
depmt = float(a[10]) * 1000
magmt = float(a[11])
var_red = float(a[12])
mxx, mxy, mxz, myy, myz, mzz, unit = map(float, a[13:20])
event_name = util.gen_sc3_id(ot)
e = Event(event_type="earthquake")
e.resource_id = _get_resource_id(event_name, 'event')
# Standard JMA solution
o_jma = Origin(time=ot,
latitude=lat,
longitude=lon,
depth=depjma,
depth_type="from location",
region=region)
o_jma.resource_id = _get_resource_id(event_name, 'origin', 'JMA')
m_jma = Magnitude(mag=magjma,
magnitude_type='ML',
origin_id=o_jma.resource_id)
m_jma.resource_id = _get_resource_id(event_name, 'magnitude', 'JMA')
# MT solution
o_mt = Origin(time=ot,
latitude=lat,
longitude=lon,
depth=depmt,
region=region,
depth_type="from moment tensor inversion")
o_mt.resource_id = _get_resource_id(event_name, 'origin', 'MT')
m_mt = Magnitude(mag=magmt,
magnitude_type='Mw',
origin_id=o_mt.resource_id)
m_mt.resource_id = _get_resource_id(event_name, 'magnitude', 'MT')
foc_mec = FocalMechanism(triggering_origin_id=o_jma.resource_id)
foc_mec.resource_id = _get_resource_id(event_name, "focal_mechanism")
nod1 = NodalPlane(strike=strike[0], dip=dip[0], rake=rake[0])
nod2 = NodalPlane(strike=strike[1], dip=dip[1], rake=rake[1])
nod = NodalPlanes(nodal_plane_1=nod1, nodal_plane_2=nod2)
foc_mec.nodal_planes = nod
tensor = Tensor(m_rr=mxx, m_tt=myy, m_pp=mzz, m_rt=mxy, m_rp=mxz, m_tp=myz)
cm = Comment(text="Basis system: North,East,Down (Jost and \
Herrmann 1989")
cm.resource_id = _get_resource_id(event_name, 'comment', 'mt')
mt = MomentTensor(derived_origin_id=o_mt.resource_id,
moment_magnitude_id=m_mt.resource_id,
scalar_moment=mo,
comments=[cm],
tensor=tensor,
variance_reduction=var_red)
mt.resource_id = _get_resource_id(event_name, 'moment_tensor')
foc_mec.moment_tensor = mt
e.origins = [o_jma, o_mt]
e.magnitudes = [m_jma, m_mt]
e.focal_mechanisms = [foc_mec]
e.preferred_magnitude_id = m_mt.resource_id.id
e.preferred_origin_id = o_mt.resource_id.id
e.preferred_focal_mechanism_id = foc_mec.resource_id.id
return e
def par2quakeml(Par_filename,
QuakeML_filename,
rotation_axis=[0.0, 1.0, 0.0],
rotation_angle=-57.5,
origin_time="2000-01-01 00:00:00.0",
event_type="other event"):
# initialise event
ev = Event()
# open and read Par file
fid = open(Par_filename, 'r')
fid.readline()
fid.readline()
fid.readline()
fid.readline()
lat_old = 90.0 - float(fid.readline().strip().split()[0])
lon_old = float(fid.readline().strip().split()[0])
depth = float(fid.readline().strip().split()[0])
fid.readline()
Mtt_old = float(fid.readline().strip().split()[0])
Mpp_old = float(fid.readline().strip().split()[0])
Mrr_old = float(fid.readline().strip().split()[0])
Mtp_old = float(fid.readline().strip().split()[0])
Mtr_old = float(fid.readline().strip().split()[0])
Mpr_old = float(fid.readline().strip().split()[0])
# rotate event into physical domain
lat, lon = rot.rotate_lat_lon(lat_old, lon_old, rotation_axis,
rotation_angle)
Mrr, Mtt, Mpp, Mtr, Mpr, Mtp = rot.rotate_moment_tensor(
Mrr_old, Mtt_old, Mpp_old, Mtr_old, Mpr_old, Mtp_old, lat_old, lon_old,
rotation_axis, rotation_angle)
# populate event origin data
ev.event_type = event_type
ev_origin = Origin()
ev_origin.time = UTCDateTime(origin_time)
ev_origin.latitude = lat
ev_origin.longitude = lon
ev_origin.depth = depth
ev.origins.append(ev_origin)
# populte event moment tensor
ev_tensor = Tensor()
ev_tensor.m_rr = Mrr
ev_tensor.m_tt = Mtt
ev_tensor.m_pp = Mpp
ev_tensor.m_rt = Mtr
ev_tensor.m_rp = Mpr
ev_tensor.m_tp = Mtp
ev_momenttensor = MomentTensor()
ev_momenttensor.tensor = ev_tensor
ev_momenttensor.scalar_moment = np.sqrt(Mrr**2 + Mtt**2 + Mpp**2 + Mtr**2 +
Mpr**2 + Mtp**2)
ev_focalmechanism = FocalMechanism()
ev_focalmechanism.moment_tensor = ev_momenttensor
ev_focalmechanism.nodal_planes = NodalPlanes().setdefault(0, 0)
ev.focal_mechanisms.append(ev_focalmechanism)
# populate event magnitude
ev_magnitude = Magnitude()
ev_magnitude.mag = 0.667 * (np.log10(ev_momenttensor.scalar_moment) - 9.1)
ev_magnitude.magnitude_type = 'Mw'
ev.magnitudes.append(ev_magnitude)
# write QuakeML file
cat = Catalog()
cat.append(ev)
cat.write(QuakeML_filename, format="quakeml")
# clean up
fid.close()
def outputOBSPY(hp, event=None, only_fm_picks=False):
"""
Make an Event which includes the current focal mechanism information from HASH
Use the 'only_fm_picks' flag to only include the picks HASH used for the FocalMechanism.
This flag will replace the 'picks' and 'arrivals' lists of existing events with new ones.
Inputs
-------
hp : hashpy.HashPype instance
event : obspy.core.event.Event
only_fm_picks : bool of whether to overwrite the picks/arrivals lists
Returns
-------
obspy.core.event.Event
Event will be new if no event was input, FocalMech added to existing event
"""
# Returns new (or updates existing) Event with HASH solution
n = hp.npol
if event is None:
event = Event(focal_mechanisms=[], picks=[], origins=[])
origin = Origin(arrivals=[])
origin.time = UTCDateTime(hp.tstamp)
origin.latitude = hp.qlat
origin.longitude = hp.qlon
origin.depth = hp.qdep
origin.creation_info = CreationInfo(version=hp.icusp)
origin.resource_id = ResourceIdentifier('smi:hash/Origin/{0}'.format(
hp.icusp))
for _i in range(n):
p = Pick()
p.creation_info = CreationInfo(version=hp.arid[_i])
p.resource_id = ResourceIdentifier('smi:nsl/Pick/{0}'.format(
p.creation_info.version))
p.waveform_id = WaveformStreamID(network_code=hp.snet[_i],
station_code=hp.sname[_i],
channel_code=hp.scomp[_i])
if hp.p_pol[_i] > 0:
p.polarity = 'positive'
else:
p.polarity = 'negative'
a = Arrival()
a.creation_info = CreationInfo(version=hp.arid[_i])
a.resource_id = ResourceIdentifier('smi:nsl/Arrival/{0}'.format(
p.creation_info.version))
a.azimuth = hp.p_azi_mc[_i, 0]
a.takeoff_angle = 180. - hp.p_the_mc[_i, 0]
a.pick_id = p.resource_id
origin.arrivals.append(a)
event.picks.append(p)
event.origins.append(origin)
event.preferred_origin_id = origin.resource_id.resource_id
else: # just update the changes
origin = event.preferred_origin()
picks = []
arrivals = []
for _i in range(n):
ind = hp.p_index[_i]
a = origin.arrivals[ind]
p = a.pick_id.getReferredObject()
a.takeoff_angle = hp.p_the_mc[_i, 0]
picks.append(p)
arrivals.append(a)
if only_fm_picks:
origin.arrivals = arrivals
event.picks = picks
# Use me double couple calculator and populate planes/axes etc
x = hp._best_quality_index
# Put all the mechanisms into the 'focal_mechanisms' list, mark "best" as preferred
for s in range(hp.nmult):
dc = DoubleCouple([hp.str_avg[s], hp.dip_avg[s], hp.rak_avg[s]])
ax = dc.axis
focal_mech = FocalMechanism()
focal_mech.creation_info = CreationInfo(creation_time=UTCDateTime(),
author=hp.author)
focal_mech.triggering_origin_id = origin.resource_id
focal_mech.resource_id = ResourceIdentifier(
'smi:hash/FocalMechanism/{0}/{1}'.format(hp.icusp, s + 1))
focal_mech.method_id = ResourceIdentifier('HASH')
focal_mech.nodal_planes = NodalPlanes()
focal_mech.nodal_planes.nodal_plane_1 = NodalPlane(*dc.plane1)
focal_mech.nodal_planes.nodal_plane_2 = NodalPlane(*dc.plane2)
focal_mech.principal_axes = PrincipalAxes()
focal_mech.principal_axes.t_axis = Axis(azimuth=ax['T']['azimuth'],
plunge=ax['T']['dip'])
focal_mech.principal_axes.p_axis = Axis(azimuth=ax['P']['azimuth'],
plunge=ax['P']['dip'])
focal_mech.station_polarity_count = n
focal_mech.azimuthal_gap = hp.magap
focal_mech.misfit = hp.mfrac[s]
focal_mech.station_distribution_ratio = hp.stdr[s]
focal_mech.comments.append(
Comment(
hp.qual[s],
resource_id=ResourceIdentifier(
focal_mech.resource_id.resource_id + '/comment/quality')))
#----------------------------------------
event.focal_mechanisms.append(focal_mech)
if s == x:
event.preferred_focal_mechanism_id = focal_mech.resource_id.resource_id
return event
def full_test_event():
"""
Function to generate a basic, full test event
"""
test_event = Event()
test_event.origins.append(
Origin(time=UTCDateTime("2012-03-26") + 1.2,
latitude=45.0,
longitude=25.0,
depth=15000))
test_event.event_descriptions.append(EventDescription())
test_event.event_descriptions[0].text = 'LE'
test_event.creation_info = CreationInfo(agency_id='TES')
test_event.magnitudes.append(
Magnitude(mag=0.1,
magnitude_type='ML',
creation_info=CreationInfo('TES'),
origin_id=test_event.origins[0].resource_id))
test_event.magnitudes.append(
Magnitude(mag=0.5,
magnitude_type='Mc',
creation_info=CreationInfo('TES'),
origin_id=test_event.origins[0].resource_id))
test_event.magnitudes.append(
Magnitude(mag=1.3,
magnitude_type='Ms',
creation_info=CreationInfo('TES'),
origin_id=test_event.origins[0].resource_id))
# Define the test pick
_waveform_id_1 = WaveformStreamID(station_code='FOZ',
channel_code='SHZ',
network_code='NZ')
_waveform_id_2 = WaveformStreamID(station_code='WTSZ',
channel_code='BH1',
network_code=' ')
# Pick to associate with amplitude
test_event.picks.append(
Pick(waveform_id=_waveform_id_1,
phase_hint='IAML',
polarity='undecidable',
time=UTCDateTime("2012-03-26") + 1.68,
evaluation_mode="manual"))
# Need a second pick for coda
test_event.picks.append(
Pick(waveform_id=_waveform_id_1,
onset='impulsive',
phase_hint='PN',
polarity='positive',
time=UTCDateTime("2012-03-26") + 1.68,
evaluation_mode="manual"))
# Unassociated pick
test_event.picks.append(
Pick(waveform_id=_waveform_id_2,
onset='impulsive',
phase_hint='SG',
polarity='undecidable',
time=UTCDateTime("2012-03-26") + 1.72,
evaluation_mode="manual"))
# Unassociated pick
test_event.picks.append(
Pick(waveform_id=_waveform_id_2,
onset='impulsive',
phase_hint='PN',
polarity='undecidable',
time=UTCDateTime("2012-03-26") + 1.62,
evaluation_mode="automatic"))
# Test a generic local magnitude amplitude pick
test_event.amplitudes.append(
Amplitude(generic_amplitude=2.0,
period=0.4,
pick_id=test_event.picks[0].resource_id,
waveform_id=test_event.picks[0].waveform_id,
unit='m',
magnitude_hint='ML',
category='point',
type='AML'))
# Test a coda magnitude pick
test_event.amplitudes.append(
Amplitude(generic_amplitude=10,
pick_id=test_event.picks[1].resource_id,
waveform_id=test_event.picks[1].waveform_id,
type='END',
category='duration',
unit='s',
magnitude_hint='Mc',
snr=2.3))
test_event.origins[0].arrivals.append(
Arrival(time_weight=0,
phase=test_event.picks[1].phase_hint,
pick_id=test_event.picks[1].resource_id))
test_event.origins[0].arrivals.append(
Arrival(time_weight=2,
phase=test_event.picks[2].phase_hint,
pick_id=test_event.picks[2].resource_id,
backazimuth_residual=5,
time_residual=0.2,
distance=15,
azimuth=25))
test_event.origins[0].arrivals.append(
Arrival(time_weight=2,
phase=test_event.picks[3].phase_hint,
pick_id=test_event.picks[3].resource_id,
backazimuth_residual=5,
time_residual=0.2,
distance=15,
azimuth=25))
# Add in error info (line E)
test_event.origins[0].quality = OriginQuality(standard_error=0.01,
azimuthal_gap=36)
# Origin uncertainty in Seisan is output as long-lat-depth, quakeML has
# semi-major and semi-minor
test_event.origins[0].origin_uncertainty = OriginUncertainty(
confidence_ellipsoid=ConfidenceEllipsoid(
semi_major_axis_length=3000,
semi_minor_axis_length=1000,
semi_intermediate_axis_length=2000,
major_axis_plunge=20,
major_axis_azimuth=100,
major_axis_rotation=4))
test_event.origins[0].time_errors = QuantityError(uncertainty=0.5)
# Add in fault-plane solution info (line F) - Note have to check program
# used to determine which fields are filled....
test_event.focal_mechanisms.append(
FocalMechanism(nodal_planes=NodalPlanes(
nodal_plane_1=NodalPlane(strike=180,
dip=20,
rake=30,
strike_errors=QuantityError(10),
dip_errors=QuantityError(10),
rake_errors=QuantityError(20))),
method_id=ResourceIdentifier(
"smi:nc.anss.org/focalMechanism/FPFIT"),
creation_info=CreationInfo(agency_id="NC"),
misfit=0.5,
station_distribution_ratio=0.8))
# Need to test high-precision origin and that it is preferred origin.
# Moment tensor includes another origin
test_event.origins.append(
Origin(time=UTCDateTime("2012-03-26") + 1.2,
latitude=45.1,
longitude=25.2,
depth=14500))
test_event.magnitudes.append(
Magnitude(mag=0.1,
magnitude_type='MW',
creation_info=CreationInfo('TES'),
origin_id=test_event.origins[-1].resource_id))
# Moment tensors go with focal-mechanisms
test_event.focal_mechanisms.append(
FocalMechanism(moment_tensor=MomentTensor(
derived_origin_id=test_event.origins[-1].resource_id,
moment_magnitude_id=test_event.magnitudes[-1].resource_id,
scalar_moment=100,
tensor=Tensor(
m_rr=100, m_tt=100, m_pp=10, m_rt=1, m_rp=20, m_tp=15),
method_id=ResourceIdentifier(
'smi:nc.anss.org/momentTensor/BLAH'))))
return test_event
def build(self):
"""
Build an obspy moment tensor focal mech event
This makes the tensor output into an Event containing:
1) a FocalMechanism with a MomentTensor, NodalPlanes, and PrincipalAxes
2) a Magnitude of the Mw from the Tensor
Which is what we want for outputting QuakeML using
the (slightly modified) obspy code.
Input
-----
filehandle => open file OR str from filehandle.read()
Output
------
event => instance of Event() class as described above
"""
p = self.parser
event = Event(event_type='earthquake')
origin = Origin()
focal_mech = FocalMechanism()
nodal_planes = NodalPlanes()
moment_tensor = MomentTensor()
principal_ax = PrincipalAxes()
magnitude = Magnitude()
data_used = DataUsed()
creation_info = CreationInfo(agency_id='NN')
ev_mode = 'automatic'
ev_stat = 'preliminary'
evid = None
orid = None
# Parse the entire file line by line.
for n,l in enumerate(p.line):
if 'REVIEWED BY NSL STAFF' in l:
ev_mode = 'manual'
ev_stat = 'reviewed'
if 'Event ID' in l:
evid = p._id(n)
if 'Origin ID' in l:
orid = p._id(n)
if 'Ichinose' in l:
moment_tensor.category = 'regional'
if re.match(r'^\d{4}\/\d{2}\/\d{2}', l):
ev = p._event_info(n)
if 'Depth' in l:
derived_depth = p._depth(n)
if 'Mw' in l:
magnitude.mag = p._mw(n)
magnitude.magnitude_type = 'Mw'
if 'Mo' in l and 'dyne' in l:
moment_tensor.scalar_moment = p._mo(n)
if 'Percent Double Couple' in l:
moment_tensor.double_couple = p._percent(n)
if 'Percent CLVD' in l:
moment_tensor.clvd = p._percent(n)
if 'Epsilon' in l:
moment_tensor.variance = p._epsilon(n)
if 'Percent Variance Reduction' in l:
moment_tensor.variance_reduction = p._percent(n)
if 'Major Double Couple' in l and 'strike' in p.line[n+1]:
np = p._double_couple(n)
nodal_planes.nodal_plane_1 = NodalPlane(*np[0])
nodal_planes.nodal_plane_2 = NodalPlane(*np[1])
nodal_planes.preferred_plane = 1
if 'Spherical Coordinates' in l:
mt = p._mt_sphere(n)
moment_tensor.tensor = Tensor(
m_rr = mt['Mrr'],
m_tt = mt['Mtt'],
m_pp = mt['Mff'],
m_rt = mt['Mrt'],
m_rp = mt['Mrf'],
m_tp = mt['Mtf'],
)
if 'Eigenvalues and eigenvectors of the Major Double Couple' in l:
ax = p._vectors(n)
principal_ax.t_axis = Axis(ax['T']['trend'], ax['T']['plunge'], ax['T']['ev'])
principal_ax.p_axis = Axis(ax['P']['trend'], ax['P']['plunge'], ax['P']['ev'])
principal_ax.n_axis = Axis(ax['N']['trend'], ax['N']['plunge'], ax['N']['ev'])
if 'Number of Stations' in l:
data_used.station_count = p._number_of_stations(n)
if 'Maximum' in l and 'Gap' in l:
focal_mech.azimuthal_gap = p._gap(n)
if re.match(r'^Date', l):
creation_info.creation_time = p._creation_time(n)
# Creation Time
creation_info.version = orid
# Fill in magnitude values
magnitude.evaluation_mode = ev_mode
magnitude.evaluation_status = ev_stat
magnitude.creation_info = creation_info.copy()
magnitude.resource_id = self._rid(magnitude)
# Stub origin
origin.time = ev.get('time')
origin.latitude = ev.get('lat')
origin.longitude = ev.get('lon')
origin.depth = derived_depth * 1000.
origin.depth_type = "from moment tensor inversion"
origin.creation_info = creation_info.copy()
# Unique from true origin ID
_oid = self._rid(origin)
origin.resource_id = ResourceIdentifier(str(_oid) + '/mt')
del _oid
# Make an id for the MT that references this origin
ogid = str(origin.resource_id)
doid = ResourceIdentifier(ogid, referred_object=origin)
# Make an id for the moment tensor mag which references this mag
mrid = str(magnitude.resource_id)
mmid = ResourceIdentifier(mrid, referred_object=magnitude)
# MT todo: could check/use URL for RID if parsing the php file
moment_tensor.evaluation_mode = ev_mode
moment_tensor.evaluation_status = ev_stat
moment_tensor.data_used = data_used
moment_tensor.moment_magnitude_id = mmid
moment_tensor.derived_origin_id = doid
moment_tensor.creation_info = creation_info.copy()
moment_tensor.resource_id = self._rid(moment_tensor)
# Fill in focal_mech values
focal_mech.nodal_planes = nodal_planes
focal_mech.moment_tensor = moment_tensor
focal_mech.principal_axes = principal_ax
focal_mech.creation_info = creation_info.copy()
focal_mech.resource_id = self._rid(focal_mech)
# add mech and new magnitude to event
event.focal_mechanisms = [focal_mech]
event.magnitudes = [magnitude]
event.origins = [origin]
event.creation_info = creation_info.copy()
# If an MT was done, that's the preferred mag/mech
event.preferred_magnitude_id = str(magnitude.resource_id)
event.preferred_focal_mechanism_id = str(focal_mech.resource_id)
if evid:
event.creation_info.version = evid
event.resource_id = self._rid(event)
self.event = event
def _internal_read_single_scardec(buf):
"""
Reads a single SCARDEC file to a :class:`~obspy.core.event.Catalog`
object.
:param buf: File to read.
:type buf: open file or file-like object
"""
# The first line encodes the origin time and epicenter
line = buf.readline()
origin_time = line.strip().split()[:6]
values = list(map(int, origin_time[:-1])) + \
[float(origin_time[-1])]
try:
origin_time = UTCDateTime(*values)
except (TypeError, ValueError):
warnings.warn("Could not determine origin time from line: %s. Will "
"be set to zero." % line)
origin_time = UTCDateTime(0)
line = line.split()[6:]
latitude, longitude = map(float, line[:2])
# The second line encodes depth and the two focal mechanisms
line = buf.readline()
line = line.split()
# First three values are depth, scalar moment (in Nm) and moment magnitude
depth, scalar_moment, moment_mag = map(float, line[0:3])
# depth is in km in SCARDEC files
depth *= 1e3
# Next six values are strike, dip, rake for both planes
strike1, dip1, rake1 = map(float, line[3:6])
strike2, dip2, rake2 = map(float, line[6:9])
# The rest of the file is the moment rate function
# In each line: time (sec), moment rate (Nm/sec)
stf_time = []
stf_mr = []
for line in buf:
stf_time.append(float(line.split()[0]))
stf_mr.append(float(line.split()[1]))
# Normalize the source time function
stf_mr = np.array(stf_mr)
stf_mr /= scalar_moment
# Calculate the time step
dt = np.mean(np.diff(stf_time))
# Calculate the stf offset (time of first sample wrt to origin time)
offset = stf_time[0]
# event name is set to generic value for now
event_name = 'SCARDEC_event'
cmt_origin = Origin(resource_id=_get_resource_id(event_name,
"origin",
tag="cmt"),
time=origin_time,
longitude=longitude,
latitude=latitude,
depth=depth,
origin_type="centroid",
region=_fe.get_region(longitude=longitude,
latitude=latitude))
cmt_mag = Magnitude(resource_id=_get_resource_id(event_name,
"magnitude",
tag="mw"),
mag=moment_mag,
magnitude_type="mw",
origin_id=cmt_origin.resource_id)
nod1 = NodalPlane(strike=strike1, dip=dip1, rake=rake1)
nod2 = NodalPlane(strike=strike2, dip=dip2, rake=rake2)
nod = NodalPlanes(nodal_plane_1=nod1, nodal_plane_2=nod2)
foc_mec = FocalMechanism(resource_id=_get_resource_id(
event_name, "focal_mechanism"),
nodal_planes=nod)
dip1 *= np.pi / 180.
rake1 *= np.pi / 180.
strike1 *= np.pi / 180.
mxx = -scalar_moment * (
(np.sin(dip1) * np.cos(rake1) * np.sin(2 * strike1)) +
(np.sin(2 * dip1) * np.sin(rake1) * np.sin(2 * strike1)))
mxy = scalar_moment * (
(np.sin(dip1) * np.cos(rake1) * np.cos(2 * strike1)) +
(np.sin(2 * dip1) * np.sin(rake1) * np.sin(2 * strike1) * 0.5))
myy = scalar_moment * (
(np.sin(dip1) * np.cos(rake1) * np.sin(2 * strike1)) -
(np.sin(2 * dip1) * np.sin(rake1) * np.cos(2 * strike1)))
mxz = -scalar_moment * (
(np.cos(dip1) * np.cos(rake1) * np.cos(strike1)) +
(np.cos(2 * dip1) * np.sin(rake1) * np.sin(strike1)))
myz = -scalar_moment * (
(np.cos(dip1) * np.cos(rake1) * np.sin(strike1)) -
(np.cos(2 * dip1) * np.sin(rake1) * np.cos(strike1)))
mzz = scalar_moment * (np.sin(2 * dip1) * np.sin(rake1))
tensor = Tensor(m_rr=mxx, m_tt=myy, m_pp=mzz, m_rt=mxy, m_rp=mxz, m_tp=myz)
cm = [
Comment(text="Basis system: North,East,Down \
(Jost and Herrmann 1989)")
]
cm[0].resource_id = _get_resource_id(event_name, 'comment', 'mt')
cm.append(
Comment(text="MT derived from focal mechanism, therefore \
constrained to pure double couple.",
force_resource_id=False))
# Write moment rate function
extra = {
'moment_rate': {
'value': stf_mr,
'namespace': r"http://test.org/xmlns/0.1"
},
'dt': {
'value': dt,
'namespace': r"http://test.org/xmlns/0.1"
},
'offset': {
'value': offset,
'namespace': r"http://test.org/xmlns/0.1"
}
}
# Source time function
stf = SourceTimeFunction(type="unknown")
stf.extra = extra
mt = MomentTensor(resource_id=_get_resource_id(event_name,
"moment_tensor"),
derived_origin_id=cmt_origin.resource_id,
moment_magnitude_id=cmt_mag.resource_id,
scalar_moment=scalar_moment,
tensor=tensor,
source_time_function=stf,
comments=cm)
# Assemble everything.
foc_mec.moment_tensor = mt
ev = Event(resource_id=_get_resource_id(event_name, "event"),
event_type="earthquake")
ev.event_descriptions.append(
EventDescription(text=event_name, type="earthquake name"))
ev.comments.append(
Comment(text="Hypocenter catalog: SCARDEC", force_resource_id=False))
ev.origins.append(cmt_origin)
ev.magnitudes.append(cmt_mag)
ev.focal_mechanisms.append(foc_mec)
# Set the preferred items.
ev.preferred_origin_id = cmt_origin.resource_id.id
ev.preferred_magnitude_id = cmt_mag.resource_id.id
ev.preferred_focal_mechanism_id = foc_mec.resource_id.id
ev.scope_resource_ids()
return ev
