Hi Arie,

Also part of the IASPEI software package is a DOS program called XRTP.
This is a data logging program, but it also has some event location
capabilities. One advantage is its written in C, not FORTRAN like
Hypoellipse. I started too pull out the location code but stopped after
finding out it only works with local events. I figured if I was going to
spend the time adding this to WinQuake I would try and find something that
could be used for all type of events...

If you get something working please let me know. I'll see if I can add it
to WinQuake. I will send you the source code in a private email message.

-Larry Cochrane
Redwood City, Ca. 

At 11:47 AM 8/22/99 +0800, you wrote:
>Hi, I have had some remarkable success with winkquake
>in predicting the location of an epicentre for a  few local
>quakes. Using the Kalamunda station and two autodrum
>stations,  it has been possible to locate an epicentre
>within 5 km of the quoted value. Though our depth of these
>quake are highly likely to be around 5 km. But you need
>a good "P" and "S" wave for the prediction.
>
>I would like to write or use a program that can locate
>a quake using the "P" waves. Can anyone help in locating
>a program, code or a source of information on how this is
>done? I guess a least squares equation is involved but the
>way depth is calculated eludes me.
>
>Any ideas.
>
>Arie
>
>
>
>
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