def get_source(lasif_root, event: str, iteration: str):
"""
Provide source information to give to Salvus
:param lasif_root: Path to project root
:type lasif_root: Union[str, pathlib.Path, object]
:param event: Name of event which we want to find the source for
:type event: str
:param iteration: Name of iteration
:type iteration: str
"""
from lasif.utils import prepare_source
comm = find_project_comm(lasif_root)
assert comm.events.has_event(event), f"Event: {event} not in project"
return prepare_source(comm, event, iteration)
def create_salvus_forward_simulation(
comm: object,
event: str,
iteration: str,
mesh=None,
side_set: str = None,
):
"""
Create a Salvus simulation object based on simulation and salvus
specific parameters specified in config file.
:param comm: The lasif communicator object
:type comm: object
:param event: Name of event
:type event: str
:param iteration: Name of iteration
:type iteration: str
:param mesh: Path to mesh or Salvus mesh object, if None it will use
the domain file from config file, defaults to None
:type mesh: Union[str, salvus.mesh.unstructured_mesh.UnstructuredMesh],
optional
:param side_set: Name of side set on mesh to place receivers,
defaults to None.
:type side_set: str, optional
"""
import salvus.flow.simple_config as sc
from salvus.flow.simple_config import stf
source_info = prepare_source(comm=comm, event=event, iteration=iteration)
iteration = comm.iterations.get_long_iteration_name(iteration)
receivers = place_receivers(comm=comm, event=event)
stf_path = os.path.join(comm.project.paths["salvus_files"], iteration,
"stf.h5")
if mesh is None:
mesh = comm.project.lasif_config["domain_settings"]["domain_file"]
if side_set is None:
recs = [
sc.receiver.seismology.Point3D(
latitude=rec["latitude"],
longitude=rec["longitude"],
network_code=rec["network-code"],
station_code=rec["station-code"],
fields=["displacement"],
) for rec in receivers
]
else:
recs = [
sc.receiver.seismology.SideSetPoint3D(
latitude=rec["latitude"],
longitude=rec["longitude"],
network_code=rec["network-code"],
station_code=rec["station-code"],
side_set_name=side_set,
fields=["displacement"],
) for rec in receivers
]
sources = [
sc.source.seismology.MomentTensorPoint3D(
latitude=src["latitude"],
longitude=src["longitude"],
depth_in_m=src["depth_in_m"],
mrr=src["mrr"],
mtt=src["mtt"],
mpp=src["mpp"],
mtp=src["mtp"],
mrp=src["mrp"],
mrt=src["mrt"],
source_time_function=stf.Custom(filename=stf_path,
dataset_name="/source"),
) for src in source_info
]
w = sc.simulation.Waveform(
mesh=mesh,
sources=sources,
receivers=recs,
)
sim_set = comm.project.simulation_settings
sal_set = comm.project.salvus_settings
w.physics.wave_equation.end_time_in_seconds = sim_set["end_time_in_s"]
w.physics.wave_equation.time_step_in_seconds = sim_set["time_step_in_s"]
w.physics.wave_equation.start_time_in_seconds = sim_set["start_time_in_s"]
w.physics.wave_equation.attenuation = sal_set["attenuation"]
import lasif.domain
domain = lasif.domain.HDF5Domain(mesh,
sim_set["absorbing_boundaries_in_km"])
if not domain.is_global_domain():
absorbing = sc.boundary.Absorbing(
width_in_meters=comm.project.
simulation_settings["absorbing_boundaries_in_km"] * 1000.0,
side_sets=["r0", "t0", "t1", "p0", "p1"],
taper_amplitude=1.0 /
comm.project.simulation_settings["minimum_period_in_s"],
)
w.physics.wave_equation.boundaries = [absorbing]
w.output.memory_per_rank_in_MB = 4000.0
w.output.volume_data.format = "hdf5"
w.output.volume_data.filename = "output.h5"
w.output.volume_data.fields = ["adjoint-checkpoint"]
w.output.volume_data.sampling_interval_in_time_steps = (
"auto-for-checkpointing")
w.validate()
return w