obspy.clients.iris.client.Client.traveltime

Client.traveltime(model='iasp91', phases=['p', 's', 'P', 'S', 'Pn', 'Sn', 'PcP', 'ScS', 'Pdiff', 'Sdiff', 'PKP', 'SKS', 'PKiKP', 'SKiKS', 'PKIKP', 'SKIKS'], evdepth=0.0, distdeg=None, distkm=None, evloc=None, staloc=None, noheader=False, traveltimeonly=False, rayparamonly=False, mintimeonly=False, filename=None)[source]

Low-level interface for traveltime Web service of IRIS (http://service.iris.edu/irisws/traveltime/) - release 1.1.1 (2012-05-15).

This method will calculates travel-times for seismic phases using a 1-D spherical earth model.

Parameters

model (str, optional) –
Name of 1-D earth velocity model to be used. Available models include:
- 'iasp91' (default) - by Int’l Assoc of Seismology and Physics of the Earth’s Interior
- 'prem' - Preliminary Reference Earth Model
- 'ak135'
phases (list[str], optional) –
Comma separated list of phases. The default is as follows:
```
['p','s','P','S','Pn','Sn','PcP','ScS','Pdiff','Sdiff',
 'PKP','SKS','PKiKP','SKiKS','PKIKP','SKIKS']
```
Invalid phases will be ignored. Valid arbitrary phases can be made up e.g. sSKJKP. See TauP documentation for more information.
evdepth (float, optional) – The depth of the event, in kilometers. Default is 0 km.

Geographical Parameters - required

The travel time web service requires a great-circle distance between an event and station be specified. There are three methods of specifying this distance:

Specify a great-circle distance in degrees, using distdeg
Specify a great-circle distance in kilometers, using distkm
Specify an event location and one or more station locations, using evloc and staloc

Parameters

evtlon – Great-circle distance from source to station, in decimal degrees. Multiple distances may be specified as a list.
distkm (float or list[float], optional) – Distance between the source and station, in kilometers. Multiple distances may be specified as a list.
evloc (tuple(float, float), optional) – The Event location (lat,lon) using decimal degrees.
staloc (tuple(float, float) or list[tuple(float, float)], optional) – Station locations for which the phases will be listed. The general format is (lat,lon). Specify multiple station locations with a list, e.g. [(lat1,lon1),(lat2,lon2),...,(latn,lonn)].

Output Parameters

Parameters

noheader (bool, optional) – Specifying noheader will strip the header from the resulting table. Defaults to False.
traveltimeonly (bool, optional) –
Returns a space-separated list of travel times, in seconds. Defaults to False.

Note

Travel times are produced in ascending order regardless of the order in which the phases are specified
rayparamonly (bool, optional) – Returns a space-separated list of ray parameters, in sec/deg.. Defaults to False.
mintimeonly (bool, optional) – Returns only the first arrival of each phase for each distance. Defaults to False.
filename (str, optional) – Name of a output file. If this parameter is given nothing will be returned. Default is None.

Return type

str or None

Returns

ASCII travel time table if no filename is given.

Example

>>> from obspy.clients.iris import Client
>>> client = Client()
>>> result = client.traveltime(evloc=(-36.122,-72.898),
...     staloc=[(-33.45,-70.67),(47.61,-122.33),(35.69,139.69)],
...     evdepth=22.9)
>>> print(result.decode())  
Model: iasp91
Distance   Depth   Phase   Travel    Ray Param  Takeoff  Incident ...
  (deg)     (km)   Name    Time (s)  p (s/deg)   (deg)    (deg)   ...
------------------------------------------------------------------...
    3.24    22.9   P         49.39    13.750     53.77    45.82   ...
    3.24    22.9   Pn        49.40    13.754     53.80    45.84   ...