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Geodetic constraint on the slip distribution of the 2006 Central Kuril earthquake

Earth, Planets and Space volume 59, pages 1095–1098 (2007)Cite this article

Abstract

We have investigated the slip distribution of the 15 November 2006 Central Kuril earthquake off Simushir Island using continuous GPS data. A dense GPS network on Hokkaido Island, northern Japan, and Sakhalin Island detected coseismic horizontal displacements of ~9 mm despite large epicentral distances of about 900–1200 km. Eastward displacements at the sites decrease to the south, and this spatial distribution feature constrains the slip on the three subfaults. Our data suggest that little slip has occurred in the southern and northern parts, but that a 6-m slip has occurred in the center of the focal region. This interpretation fits well with the detailed slip distribution inferred from teleseismic waveform inversions. The total seismic moment, 2.8 × 1021 N m, is approximately the value indicated using by the Global CMT solution. Our result implies that there remains a seismic gap between this event and the 1952 great Kamchatkan earthquake that is large enough for an M > 8 earthquake.

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Authors and Affiliations

  1. Institute of Seismology and Volcanology, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido, 060-0810, Japan

    Hiroaki Takahashi & Minoru Kasahara

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  1. Hiroaki Takahashi
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  2. Minoru Kasahara
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Correspondence to Hiroaki Takahashi.

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Takahashi, H., Kasahara, M. Geodetic constraint on the slip distribution of the 2006 Central Kuril earthquake. Earth Planet Sp 59, 1095–1098 (2007). https://doi.org/10.1186/BF03352052

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