obspy.core.event.source.FocalMechanism

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

Bases: AbstractEventTypeWithResourceID

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) – 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) – 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

defaults

do_not_warn_on

item

key

readonly

warn_on_non_default_key

Public Methods

clear

Clear the class :return:

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

values

Private Methods

Warning

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

FocalMechanism._cast_type(key, value)

Cast type of value to type required in _types dict.

Parameters:

  • key (str) – The key from __setattr__.

  • value – The value being set to key.

Returns:

value cast to correct type.

FocalMechanism._pretty_str(priorized_keys=[], min_label_length=16)

Return better readable string representation of AttribDict object.

Parameters:

  • priorized_keys (list[str], optional) – Keywords of current AttribDict which will be shown before all other keywords. Those keywords must exists otherwise an exception will be raised. Defaults to empty list.

  • min_label_length (int, optional) – Minimum label length for keywords. Defaults to 16.

Returns:

String representation of current AttribDict object.

FocalMechanism._repr_pretty_(p, cycle)

Special Methods

FocalMechanism.__bool__()
classmethod FocalMechanism.__class_getitem__()

Represent a PEP 585 generic type

E.g. for t = list[int], t.__origin__ is list and t.__args__ is (int,).

FocalMechanism.__contains__(key)
FocalMechanism.__delattr__(name)
FocalMechanism.__delitem__(name)
FocalMechanism.__dir__()

Default dir() implementation.

FocalMechanism.__eq__(other)

Two instances are considered equal if all attributes and all lists are identical.

FocalMechanism.__format__(format_spec, /)

Default object formatter.

FocalMechanism.__ge__(value, /)

Return self>=value.

FocalMechanism.__getattr__(name, default=None)

Py3k hasattr() expects an AttributeError no KeyError to be raised if the attribute is not found.

FocalMechanism.__getattribute__(name, /)

Return getattr(self, name).

FocalMechanism.__getitem__(name, default=None)
FocalMechanism.__gt__(value, /)

Return self>value.

FocalMechanism.__init__(force_resource_id=True, *args, **kwargs)
FocalMechanism.__init_subclass__()

This method is called when a class is subclassed.

The default implementation does nothing. It may be overridden to extend subclasses.

FocalMechanism.__iter__()
FocalMechanism.__le__(value, /)

Return self<=value.

FocalMechanism.__len__()
FocalMechanism.__lt__(value, /)

Return self<value.

FocalMechanism.__ne__(other)
FocalMechanism.__new__(**kwargs)
FocalMechanism.__reduce__()

Helper for pickle.

FocalMechanism.__reduce_ex__(protocol, /)

Helper for pickle.

FocalMechanism.__repr__()
FocalMechanism.__setattr__(name, value)

Custom property implementation that works if the class is inheriting from AttribDict.

FocalMechanism.__setitem__(key, value)
FocalMechanism.__sizeof__()

Size of object in memory, in bytes.

FocalMechanism.__str__(force_one_line=False)

Fairly extensive in an attempt to cover several use cases. It is always possible to change it in the child class.

classmethod FocalMechanism.__subclasshook__(C)