obspy.core.event.Arrival

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

Bases: obspy.core.event.__Arrival

Successful association of a pick with an origin qualifies this pick as an arrival. An arrival thus connects a pick with an origin and provides additional attributes that describe this relationship. Usually qualification of a pick as an arrival for a given origin is a hypothesis, which is based on assumptions about the type of arrival (phase) as well as observed and (on the basis of an earth model) computed arrival times, or the residual, respectively. Additional pick attributes like the horizontal slowness and backazimuth of the observed wave - especially if derived from array data - may further constrain the nature of the arrival. [from the QuakeML Basic Event Description, Version 1.1, page 38]

Parameters:
  • resource_id (ResourceIdentifier) Resource identifier of Arrival.
  • pick_id (ResourceIdentifier) Refers to a resource_id of associated Pick.
  • phase (str) Phase identification. Free-form text field describing the phase. In QuakeML this is a separate type but it just contains a single field containing the phase as a string.
  • time_correction (float, optional) Time correction value in seconds.
  • azimuth (float, optional) Azimuth of station as seen from the epicenter in degree.
  • distance (float, optional) Epicentral distance in degree.
  • takeoff_angle (float, optional) Take-off angle.
  • takeoff_angle_errors (AttribDict) AttribDict containing error quantities.
  • time_residual (float, optional) Residual between observed and expected arrival time assuming proper phase identification and given the earth_model_id of the Origin in seconds.
  • horizontal_slowness_residual (float, optional) Residual of horizontal slowness in seconds per degree.
  • backazimuth_residual (float, optional) Residual of backazimuth in degree.
  • time_weight (float, optional) Weight of this Arrival in the computation of the associated Origin.
  • horizontal_slowness_weight (float, optional) Weight of horizontal slowness.
  • backazimuth_weight (float, optional) Weight of backazimuth.
  • earth_model_id (ResourceIdentifier, optional) Earth model which is used for the association of Arrival to Pick and computation of the residuals.
  • 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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