Latest Earthquakes

Earthquake Travel Times: Specify Earthquake

Generate a listing of the times that phases arrived at your seismic station
from a specified earthquake.

Earthquake Travel Time Information and Calculator Home Page

** By using the button "Store coordinates," the station coordinates that currently appear will be stored by your browser for later use. They are retrieved by using the button "Retrieve coordinates." When you exit your browser, these values will be stored on your hard disk. This information is stored in a file named cookies.txt, and the term used for this is saving "cookies." Only the computer that originally stored the information as a cookie can get it back again.

Travel times are based on the IASP91 earth model (Kennett, B.L.N. and Engdahl, E.R., 1991, Traveltimes for global earthquake location and phase identification, Geophys. J. Int., v 105, pp 429-465). The program was developed with help from Arthur Snoke and subroutines from Ray Buland (ftp hazards.cr.usgs.gov/tau/UNIX/tau.tar.Z). Note that times are approximate and that no ellipsoid corrections are made.

Seismic station coordinates:	Latitude -90,+90 decimal degrees north positive, south negative	Longitude -180,+180 decimal degrees east positive, west negative

Location and origin time of the earthquake:	Latitude	Longitude
	Depth (km)	Hour, minute, and second of event (eg: 221257)
	Magnitude of event (eg 5.5)
Phases:	P, Pdiff, PKP, and PKiKP P, Pdiff, PKP, PKiKP, S, Sdiff, and SKS All branches

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U.S. Department of the Interior \| U.S. Geological Survey URL: http://neic.usgs.gov/neis/travel_times/compute_tt.html Contact: NEIC Web Team Last modification: Monday, 2005 April 18 11:37 MDT