Fun talk at the USGS last (Thur) night: ShakeAlert! --building an earthquake early warning system for California by Doug Given
He's a good speaker. If you get a chance to hear him, go for it. http://online.wr.usgs.gov/calendar/ The video should be up in their archives in a few days. http://online.wr.usgs.gov/calendar/2012.html (scroll down to April) The basic idea is to detect an earthquake at location X, and then spread the word using telecommunications. Earthquakes propagate at 2 miles/sec so phone/internet is much faster. Ballpark is 30-60 seconds of warning. The reason this might be interesting for time-nuts is that he mentioned using GPS to supplement seismometers. The context is that they need the answer in a few seconds. I didn't catch any details. It's unlikely that they are doing any fancy post-processing. I suppose it's possible that they have streamlined the traditional post-processing setup so that they can do it in a few seconds. Maybe that is mostly getting an early look at the data the traditional post-processing processing uses. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
