Glen, I've attached an URL for an abstract you might find interesting, considering your interest in Anza-area quakes, and patterns of seismicity. It is the second article at the page the URL leads to. Titled: "Aftershock Detection Thresholds as a Function of Time: Results from the ANZA Seismic Network following the 31 October 2001 ML 5.1 Anza, California, Earthquake."

If you have any problem accessing the full article let me know.

I'm going to likely post a little later today about the first article on that page.

MW
93420

• Anza