High-Rate GPS Applications for Seismology: What Next?

Kristine M. Larson
Department of Aerospace Engineering Sciences
University of Colorado,  Boulder


Abstract:
It has been demonstrated that high-rate GPS provides useful measurements of
seismic waves in cases where seismic instrumentation clips
[Larson et al., 2003].  But many important questions remain to be answered.  In
the absense of clipping, are there any specific scientific questions that can
be answered with high-rate GPS data but not with seismometers or strainmeters? 
At what rate should we operate GPS receivers ?  What are the cost-benefit
trade-offs ? Should we concentrate on real-time or post-processed high-rate GPS
solutions? Examples from analysis of high-rate GPS data from the Denali Fault
(2002 November 03), Tokachi-Oki (2003 September 25)and
San Simeon (2003 December 22) earthquakes will be shown and discussed.