Hi Kareem,
                   I have a starter on my www pages that I did some years ago
   it came out of my studies for my BSc in Geology during the 1990's

http://www.sydneystormcity.com/fomec.htm

   its a starting point for you   :)

Dave N
Sydney

At 10:39 PM 6/7/2009 -0700, you wrote:
>Can someone help explain how to read these first motion focal mechanism
>diagram balls? I have always seen these but was not able to decipher them
>too well.
>
>http://quake.wr.usgs.gov/recenteqs/QuakeAddons/nc40237749.ncfm1.html
>------------------
>Kareem J. Lanier
>El Sobrante, California (N37.96 W122.32)
>East Bay Area Region

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