Description
The traveltime webservice calculates travel-times for seismic phases using a 1-D spherical earth model.
Example of different ways to specify distance
- Specify a great–circle distance in degrees, using
distdeg: ../query?distdeg=70&model=prem - Specify a great-circle distance in kilometers, using
distkm: ./query?distkm=10,100,1000&model=iasp91 - Specify an event location and one or more station locations, using
evlocandstaloc- travel times for the 27Feb2010 Chile earthquake as seen at station IU-ANMO:
…/query?staloc=[34.946,-106.457]&evloc=[-36.122,-72.898]&evdepth=22.9 - travel times for the 27Feb2010 Chile earthquake as seen in Santiago, Seattle, Tokyo, Zurich:
…/query?evloc=[-36.122,-72.898]&staloc=[-33.45,-70.67],[47.61,-122.33],[35.69,139.69],[47.37,8.55]&evdepth=22.9
- travel times for the 27Feb2010 Chile earthquake as seen at station IU-ANMO:
Example output format
Here is a snippet of the default output for the query: /irisws/traveltime/1/query?distkm=100
Model: iasp91
Distance Depth Phase Travel Ray Param Takeoff Incident Purist Purist
(deg) (km) Name Time (s) p (s/deg) (deg) (deg) Distance Name
-----------------------------------------------------------------------------------
0.90 0.0 P 17.24 19.170 89.32 89.32 0.90 = P
0.90 0.0 P 18.47 17.053 62.81 62.81 0.90 = P
0.90 0.0 P 18.54 17.768 67.94 67.94 0.90 = P
...
0.90 0.0 PcP 511.31 0.086 0.26 0.26 0.90 = PcP
0.90 0.0 ScS 935.64 0.159 0.28 0.28 0.90 = ScS
0.90 0.0 PKiKP 994.58 0.020 0.06 0.06 0.90 = PKiKP
0.90 0.0 SKiKS 1418.88 0.023 0.04 0.04 0.90 = SKiKS
Options that modify the output:
noheader
/irisws/traveltime/1/query?distkm=100&noheader=true
0.90 0.0 P 17.24 19.170 89.32 89.32 0.90 = P
0.90 0.0 P 18.47 17.053 62.81 62.81 0.90 = P
0.90 0.0 P 18.54 17.768 67.94 67.94 0.90 = P
0.90 0.0 PKiKP 994.58 0.020 0.06 0.06 0.90 = PKiKP
...
mintimeonly
/irisws/traveltime/1/query?distkm=100&mintimeonly=true
Model: iasp91
Distance Depth Phase Travel Ray Param Takeoff Incident Purist Purist
(deg) (km) Name Time (s) p (s/deg) (deg) (deg) Distance Name
-----------------------------------------------------------------------------------
0.90 0.0 P 17.24 19.170 89.32 89.32 0.90 = P
0.90 0.0 PKiKP 994.58 0.020 0.06 0.06 0.90 = PKiKP
0.90 0.0 PcP 511.31 0.086 0.26 0.26 0.90 = PcP
0.90 0.0 Pn 19.89 13.754 45.84 45.84 0.90 = Pn
0.90 0.0 S 29.76 33.091 89.29 89.29 0.90 = S
0.90 0.0 SKiKS 1418.88 0.023 0.04 0.04 0.90 = SKiKS
0.90 0.0 ScS 935.64 0.159 0.28 0.28 0.90 = ScS
0.90 0.0 Sn 34.51 24.739 48.38 48.38 0.90 = Sn
traveltimeonly
/traveltime/1/query?distkm=100&traveltimeonly=true
17.24037 18.46847 18.54441 19.88808 19.88825 19.96896 29.75996 31.90269 32.01175 ...
rayparamonly
/irisws/traveltime/1/query?distkm=100&rayparamonly=true
19.170197 17.052963 17.768200 13.754018 13.754236 14.721737 33.091156 29.558502 ...
Notes
...represents additional lines that were not included here- This service is built upon the TauP Toolkit package (v. 2.4.5) from USC.
- More information on the traveltime toolkit
- TauP documentation from the USC website [PDF]
Problems with this service?
Please send an email report of which service you were using, your URL query, and any error feedback to:
[email protected]
We will address your issue as soon as possible.
