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Re: ??finding distance of E.Q. from given location??

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I use the Clark 1866 Geoid to calculate the coordinates of each location in
what ever unit I want and then use Algebra's Pythagerean Theorem to
calculate the distance.  Not the quickest way by hand, but a PC can handle
the calculations in seconds.

Russel Madere

----- Original Message -----
From: Khosrownia, Ghassem SPK <GKhosrownia(--nospam--at)spk.usace.army.mil>
To: <seaint(--nospam--at)seaint.org>
Cc: Kutch, Wayne E NWS <Wayne.E.Kutch(--nospam--at)NWS02.usace.army.mil>; Wong, Anita J
NWS <Anita.J.Wong(--nospam--at)NWS02.usace.army.mil>
Sent: Wednesday, January 12, 2000 2:41 PM
Subject: ??finding distance of E.Q. from given location??


> All,
>
> In trying to determine distance from epicenter of Hector-Mine and
Northridge
> earthquakes from some project sites I found the following link that can
help
> in converting the longitude latitude information to distances
> http://www.best.com/~williams/gccalc.htm. I have not looked at exactly how
> this is developed, but it seems the site is developed by a pilot for a
> pilot. Have you used something like this before? Would you know of a more
> reliable way to estimate the distances (except scaling off the maps)?
>
> Thanks for any input and feedback.
>
>
> Ghassem.
>
>