Roger-Ring maps sound good, but even better would be an animation of occurrence of earthquakes by date/time. Since this page is sort of a hobby for me (although my research is on faults), I might not actually download the program and run it. (I'm starting to feel pressure to accomplish something workwise...). But, if animations were linked from this page I would check them out (there was an animation of all California EQs larger than 4 or 5 a couple of weeks ago). For example, there was just a post here that the earthquake pattern in the Bay area is looking similar to before 1906. An animation of occurrence of earthquakes over M2.5 (for example) since 1980 or whenever a good network was in place might show some interesting patterns. I've been watching California earthquakes pretty closely since 1988, but have not been paying as much attention to central and northern California, so can't really judge whether the recent Bay area activity is unusual. Chris