obspy.core.event.FocalMechanism

class FocalMechanism(*args, **kwargs)[source]

Bases: obspy.core.event.__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.
  • 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) Number of station polarities used for determination of focal mechanism.
  • misfit (float, optional) Fraction of misfit polarities in a first-motion focal mechanism determination. Fractional value between 0 and 1.
  • station_distribution_ratio (float, optional) Station distribution ratio (STDR) parameter. Indicates how the stations are distributed about the focal sphere. Fractional value between 0 and 1.
  • method_id (ResourceIdentifier, optional) Resource identifier of the method used for determination of the focal mechanism.
  • waveform_id (WaveformStreamID, optional) Identifies the waveform stream.
  • 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.

Attributes

__abstractmethods__ frozenset() -> empty frozenset object
__dict__
__doc__ str(object) -> string
__hash__
__module__ str(object) -> string
__weakref__ list of weak references to the object (if defined)
defaults dict() -> new empty dictionary
item tuple() -> empty tuple
key str(object) -> string
readonly list() -> new empty list

Public Methods

clear
copy
get
items
iteritems
iterkeys
itervalues
keys
pop
popitem
setdefault
update
values

Private Methods

_pretty_str Return better readable string representation of AttribDict object.

Special Methods

__contains__
__deepcopy__
__delattr__
__delitem__
__eq__ Two instances are considered equal if all attributes and all lists
__getattr__
__getitem__
__getstate__
__init__
__iter__
__len__
__ne__
__nonzero__
__repr__
__setattr__ Custom property implementation that works if the class is
__setitem__
__setstate__
__str__ Fairly extensive in an attempt to cover several use cases.
__subclasshook__

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