Hi Don,

Yeah, I've heard a lot of tones for the Geysers in Sonoma and the sound is not the same as when I am on the westward side of the RCF. Geology plays a large role in ear tones. Its a good thing I took those classes.

This ear tone was heard around 3PM while I was with someone in Sonoma, so I knew I could be 1/2 second off and that makes a big difference in determining epicenters. But I'm sure glad I posted it last night or it would have been to late today.

So far as I know Don, you are the best amateur predictor I've ever seen. You keep nice tight windows and you have a really good record. I seriously doubt ear tones will ever work with a tighter window, but I could be wrong. It takes a lot of years to learn about these events and there are still questions to answer. Hopefully, one day the answers will arrive and what seems somewhat mysterious today will be no longer.

However, the best part is that it only takes an ear to hear it, a map and a calculator to determine just about where and two hands to type up the predictions. Nothing fancy, no long hours developing programs, its just an ordinary human experience. Truly, there is nothing special about it.

Petra