Advances in Geosciences
www.adv-geosci.net
1680-7340
1680-7359
14
2nd EGU Alexander von Humboldt Conference "The role of Geophysics in Natural Disaster Prevention"
2008
10.5194/adgeo-14-129-2008
http://www.adv-geosci.net/14/129/2008/
http://www.adv-geosci.net/14/129/2008/adgeo-14-129-2008.html
http://www.adv-geosci.net/14/129/2008/adgeo-14-129-2008.pdf
129
134
2008-01-02
Tsunami waveform analyses of the 2006 underthrust and 2007 outer-rise Kurile earthquakes
Y. Tanioka
tanioka@mail.sci.hokudai.ac.jp
Y. Hasegawa
T. Kuwayama
Institute of Seismology and Volcanlogy, Hokkaido University, N10W8 Kitaku, Sapporo, Japan
Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, Japan
The 2006 large interplate Kurile earthquake proved that the entire plate
interface of the Kurile-Kamchatka subduction zone was strongly coupled from
Hokkaido, Japan, to Kamchatka, Russia. The seismic moment of the 2006 Kurile
earthquake estimated from ten tsunami waveforms is 3.1×10<sup>21</sup> Nm
(<i>M<sub>w</sub></i>=8.3). This estimate is consistent with the seismic moment estimated from the
seismological data in the Global CMT catalog. The computed tsunami
propagation indicates that scattering of the tsunami waves occurred at the
shallow region near the Emperor Ridge. The computed tsunami propagation also
indicates that large later tsunami waves observed at Crescent City is caused
by the shallow region along the Mendocino Fracture Zone. The seismic moment
of the 2007 outer-rise Kurile earthquake estimated from tsunami waveforms is
1.0×10<sup>21</sup> Nm (<i>M<sub>w</sub></i>=8.0). This estimate is also consistent with the
seismic moment in the Global CMT catalog.
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