obspy.core.event.source.FocalMechanism

class FocalMechanism(force_resource_id=True, *args, **kwargs)[source]

Bases: obspy.core.event.base.__FocalMechanism

This class describes the focal mechanism of an event. It includes different descriptions like nodal planes, principal axes, and a moment tensor. The moment tensor description is provided by objects of the class MomentTensor which can be specified as child elements of FocalMechanism.

Parameters:
  • resource_id (ResourceIdentifier) – Resource identifier of FocalMechanism.
  • force_resource_id (bool, optional) – If set to False, the automatic initialization of resource_id attribute in case it is not specified will be skipped.
  • triggering_origin_id (ResourceIdentifier, optional) – Refers to the resource_id of the triggering origin.
  • nodal_planes (NodalPlanes, optional) – Nodal planes of the focal mechanism.
  • principal_axes (PrincipalAxes, optional) – Principal axes of the focal mechanism.
  • azimuthal_gap (float, optional) – Largest azimuthal gap in distribution of stations used for determination of focal mechanism. Unit: deg
  • station_polarity_count (int, optional) –
  • misfit (float, optional) – Fraction of misfit polarities in a first-motion focal mechanism determination. Decimal fraction between 0 and 1.
  • station_distribution_ratio (float, optional) – Station distribution ratio (STDR) parameter. Indicates how the stations are distributed about the focal sphere (Reasenberg and Oppenheimer 1985). Decimal fraction between 0 and 1.
  • method_id (ResourceIdentifier, optional) – Resource identifier of the method used for determination of the focal mechanism.
  • waveform_id (list of WaveformStreamID, optional) – Refers to a set of waveform streams from which the focal mechanism was derived.
  • evaluation_mode (str, optional) – Evaluation mode of FocalMechanism. See EvaluationMode for allowed values.
  • evaluation_status (str, optional) – Evaluation status of FocalMechanism. See EvaluationStatus for allowed values.
  • moment_tensor (MomentTensor, optional) – Moment tensor description for this focal mechanism.
  • comments (list of Comment, optional) – Additional comments.
  • creation_info (CreationInfo, optional) – Creation information used to describe author, version, and creation time.

Note

For handling additional information not covered by the QuakeML standard and how to output it to QuakeML see the ObsPy Tutorial.

Attributes

__abstractmethods__
__dict__
__doc__
__hash__
__module__
__reversed__
__slots__
__weakref__ list of weak references to the object (if defined)
defaults
do_not_warn_on
item
key
readonly
warn_on_non_default_key

Public Methods

clear
copy
get
items
keys
pop If key is not found, d is returned if given, otherwise KeyError is raised.
popitem as a 2-tuple; but raise KeyError if D is empty.
setdefault
update If E present and has a .keys() method, does: for k in E: D[k] = E[k] If E present and lacks .keys() method, does: for (k, v) in E: D[k] = v In either case, this is followed by: for k, v in F.items(): D[k] = v
values

Private Methods

Warning

Private methods are mainly for internal/developer use and their API might change without notice.

_pretty_str Return better readable string representation of AttribDict object.
_repr_pretty_

Special Methods

__bool__
__contains__
__deepcopy__ reset resource_id’s object_id after deep copy to allow the object specific behavior of get_referred_object
__delattr__
__delitem__
__dir__ Default dir() implementation.
__eq__ Two instances are considered equal if all attributes and all lists are identical.
__format__ Default object formatter.
__getattr__ Py3k hasattr() expects an AttributeError no KeyError to be raised if the attribute is not found.
__getitem__
__getstate__
__init__
__init_subclass__ This method is called when a class is subclassed.
__iter__
__len__
__ne__
__new__ Create and return a new object.
__nonzero__
__reduce__ Helper for pickle.
__reduce_ex__ Helper for pickle.
__repr__
__setattr__ Custom property implementation that works if the class is inheriting from AttribDict.
__setitem__
__setstate__
__sizeof__ Size of object in memory, in bytes.
__str__ Fairly extensive in an attempt to cover several use cases.
__subclasshook__ Abstract classes can override this to customize issubclass().