Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (Mw 9.1)

Details Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (Mw 9.1) Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (Mw 9.1)

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3800g09y&link_type=abstract

Geophysical Research Letters, Volume 38, CiteID L00G09

Physics

5

Geodesy And Gravity: Seismic Cycle Related Deformations (6924, 7209, 7223, 7230), Seismology: Earthquake Dynamics (1242), Seismology: Earthquake Source Observations (1240), Seismology: Subduction Zones (1207, 1219, 1240), Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413)

Scientific paper

The space-time fault displacement history of the 11 March 2011 Tohoku (Mw 9.1) megathrust earthquake is obtained by least-squares inversion of high-rate (1 sample per second) GPS ground motions recorded in Japan. Complete near-source time-varying and static ground motions for periods ≥25 s are fit in the inversion using a normal mode formalism to compute the Green functions. The basic rupture pattern is stable for various choices of model parameters and solution smoothing, and excellent fits to the complete seismo-geodetic ground motions are obtained. The preferred solution has concentrations of slip near the trench and hypocenter, with sub-fault source time function durations of ˜30-70 s and maximum slip of ˜60 m. Down-dip slip spreads over a wider area with smaller maximum slip (<˜10-15 m). Inversion of the high-rate GPS data exploits both the timing and total displacement information in the ground motions, yielding stable estimates of the seismic moment (˜4.8 × 1022 Nm; Mw = 9.1) and slip distribution.

Affiliated with

Also associated with

No associations

Rating

Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (Mw 9.1) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (Mw 9.1), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inversion of high-rate (1 sps) GPS data for rupture process of the 11 March 2011 Tohoku earthquake (Mw 9.1) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1401321