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I. Introduction On March 11th 2011, a violent Mw=9 earthquake stroke Japan causing

Summary: I. Introduction
On March 11th 2011, a violent Mw=9 earthquake stroke Japan causing
28000 victims, including casualties and missing. This earthquake
triggered a devastating tsunami causing severe damage in cities and
nuclear facilities along the Japanese coast. The amount of data recorded
from this earthquake is exceptional, with thousands of broadband,
strong motion and continuous GPS sensors located all over Japan. This
provides a great opportunity for seismologist and engineers to deeply
investigate the rupture process in order to better understand the
physics of this type of earthquakes and their associated effects, like
Kinematic source inversion of strong ground motion, teleseismic,
geodetic and tsunami data and source imaging by back-projection of
body waves recorded by teleseismic arrays (e.g, Simons et al, 2011;
Meng et al, 2011) suggest that the earthquake featured a diversity of
rupture styles, comprising distinct stages of fast and slow rupture
intermingled with high-frequency radiation. Those results also revealed
a clear spatial complementarity between the regions of low and high
frequency radiation: the regions of large slip had long rise time
dominating the low frequency radiation and the strongest high


Source: Ampuero, Jean Paul - Division of Geological and Planetary Sciences, California Institute of Technology


Collections: Geosciences