Slip Distribution of the 1963 Great Kurile Earthquake Estimated from Tsunami Waveforms |
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| Authors: | Kei Ioki Yuichiro Tanioka |
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| Institution: | 1. Institute of Seismology and Volcanology, Hokkaido University, N10W8 Kitaku, Sapporo, 060-0810, Japan
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| Abstract: | The 1963 great Kurile earthquake was an underthrust earthquake occurred in the Kurile?CKamchatka subduction zone. The slip distribution of the 1963 earthquake was estimated using 21 tsunami waveforms recorded at tide gauges along the Pacific and Okhotsk Sea coasts. The extended rupture area was divided into 24 subfaults, and the slip on each subfault was determined by the tsunami waveform inversion. The result shows that the largest slip amount of 2.8?m was found at the shallow part and intermediate depth of the rupture area. Large slip amounts were found at the shallow part of the rupture area. The total seismic moment was estimated to be 3.9?×?1021?Nm (Mw 8.3). The 2006 Kurile earthquake occurred right next to the location of the 1963 earthquake, and no seismic gap exists between the source areas of the 1963 and 2006 earthquakes. |
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