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Long-period surface motion of the multi-patch Mw9.0 Tohoku-Oki earthquake

Psimoulis, Panos; Houlie, Nicolas; Michel, Clotaire; Meindl, Michael; Rothacher, Markus

Authors

Nicolas Houlie

Clotaire Michel

Michael Meindl

Markus Rothacher



Abstract

We show that it is possible to capture the oscillatory ground motion induced by the Tohoku-Oki event for periods ranging from 3 to 100s using Precise Point Positioning (PPP). We find that the ground motions of the sedimentary basins of Japan were large (respectively > 0.15m/s and >0.15m/s2 for velocity and acceleration) even for periods larger than 3s. We compare geodetic observables with a Ground Motion Prediction Equation (GMPE) designed for Japan seismicity and find that the Spectral Acceleration (SA) is well estimated for periods larger than 3s and distances ranging from 100 to 500km. At last, through the analysis of the displacement attenuation plots, we show that the 2011 Tohoku-Oki event is likely composed of multiple rupture patches as suggested before by time-reversal inversions of seismic data.

Journal Article Type Article
Publication Date Nov 1, 2014
Journal Geophysical Journal International
Print ISSN 0956-540X
Electronic ISSN 1365-246X
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 199
Issue 2
APA6 Citation Psimoulis, P., Houlie, N., Michel, C., Meindl, M., & Rothacher, M. (2014). Long-period surface motion of the multi-patch Mw9.0 Tohoku-Oki earthquake. Geophysical Journal International, 199(2), https://doi.org/10.1093/gji/ggu302
DOI https://doi.org/10.1093/gji/ggu302
Keywords satellite geodesy, transient deformation, earthquake ground motions, surface waves and free oscillations, early warning
Publisher URL http://gji.oxfordjournals.org/content/199/2/968
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This is a pre-copyedited, author-produced PDF of an article accepted for publication in Geophysical Journal International following peer review. The version of record Long-period surface motion of the multipatch Mw9.0 Tohoku-Oki earthquake / Geophys. J. Int. (2014) 199 (2):968-980 is available online at: http://gji.oxfordjournals.org/content/199/2/968

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf



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