Dynamic fault rupture model of the 2008 Iwate-Miyagi Nairiku earthquake, Japan

Dr. Luis A. Dalguer (ETHZ), Dr. Nelson Pulido (NIED, Japan), Dr. Shin Aoi (NIED, Japan)

Here we investigate the physical causes of the extreme ground motion generated by the 2008 Iwate-Miyagi Nairiku earthquake in Japan. This earthquake generated high frequency (HF) extreme accelerations of 3.9g and 3.5g recorded at IWTH25 station (figure below). In order to understand the generation mechanism of these HF events, we perform a dynamic fault rupture model of this earthquake and identify the source of this extreme event.

_{Figure: Observed UD acceleration component (surface and borehole) at IWTH25 station}