Glen wrote:: "At some point, we need to get to the core of the issue, and that is the depth and strike of the two surfaces. Epicenters are vertically over the focal mechanism."

You want hypocenters in addition to epicenters. Seems like nobody can even get epicenters, so why are we digging deeper (forgive the pun) when the surface elements are elusive at best? You're asking for the frosting on the cake before the batter has even been stirred.

Cathryn