Title |
Using 1-Hz GPS Data to Measure Deformations Caused by the Denali Fault Earthquake
|
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Published in |
Science, May 2003
|
DOI | 10.1126/science.1084531 |
Pubmed ID | |
Authors |
Kristine M. Larson, Paul Bodin, Joan Gomberg |
Abstract |
The 3 November 2002 moment magnitude 7.9 Denali fault earthquake generated large, permanent surface displacements in Alaska and large-amplitude surface waves throughout western North America. We find good agreement between strong ground-motion records integrated to displacement and 1-hertz Global Positioning System (GPS) position estimates collected approximately 140 kilometers from the earthquake epicenter. One-hertz GPS receivers also detected seismic surface waves 750 to 3800 kilometers from the epicenter, whereas these waves saturated many of the seismic instruments in the same region. High-frequency GPS increases the dynamic range and frequency bandwidth of ground-motion observations, providing another tool for studying earthquake processes. |
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