[time-nuts] GPS, USGS Early Earthquake Warning
hmurray at megapathdsl.net
Fri Apr 27 03:55:40 EDT 2012
Fun talk at the USGS last (Thur) night:
--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.
The video should be up in their archives in a few days.
(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.
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