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

Psimoulis, Panos and Houlie, Nicolas and Michel, Clotaire and Meindl, Michael and Rothacher, Markus (2014) Long-period surface motion of the multi-patch Mw9.0 Tohoku-Oki earthquake. Geophysical Journal International, 199 (2). pp. 968-980. ISSN 1365-246X

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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.

Item Type: Article
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
Keywords: satellite geodesy, transient deformation, earthquake ground motions, surface waves and free oscillations, early warning
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Civil Engineering
Identification Number: https://doi.org/10.1093/gji/ggu302
Depositing User: Psimoulis, Dr Panagiotis
Date Deposited: 22 Jul 2016 09:41
Last Modified: 19 Sep 2016 08:47
URI: http://eprints.nottingham.ac.uk/id/eprint/35256

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