Ability of 1-Hz GPS data to infer the source process of a medium-sized earthquake: The case of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake

Details Ability of 1-Hz GPS data to infer the source process of a medium-sized earthquake: The case of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake Ability of 1-Hz GPS data to infer the source process of a medium-sized earthquake: The case of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3612301y&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 12, CiteID L12301

Physics

3

Seismology: Earthquake Source Observations (1240), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Seismology: Earthquake Ground Motions And Engineering Seismology, Seismology: Earthquake Dynamics (1242), Geodesy And Gravity: Space Geodetic Surveys

Scientific paper

We demonstrate the ability of 1-Hz Global Positioning System (GPS) data to infer a medium-sized (M6 class) earthquake source process through an inversion study of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake (M˜6.9). 1-Hz GPS waveforms for this earthquake are compared, and show good agreement with strong motion waveforms. Ground motions are well recorded at a sufficient number of GPS stations in and around source region, allowing us to perform waveform inversion using 1-Hz GPS data only. The 1-Hz GPS inversion result shows fairly good agreement with a joint inversion of geodetic and strong motion data, such as the seismic moment (Mw˜6.9), cumulative slip distribution, and rupture propagation. Such agreements demonstrate that 1-Hz GPS is able to infer the dynamic features of the rupture process as well as permanent (or static) slip even for a M6 class medium-sized earthquake.

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