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Rupture pattern of a moderate earthquake in Odaesan, Korea

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Abstract

We investigated the fault geometry and slip distribution of the 2007 Odaesan, Korea, earthquake (ML 4.8). Because of the favorable location, we could use several nearby stations for the analyses. Four foreshocks and four aftershocks were found from continuous waveform data, and their locations, including the mainshock, were aligned to the northwest∼southeast direction. The source time function that was estimated by deconvolution of displacement waveforms seems to be shorter to the northwest. We could image the slip distribution using waveform inversions and found that it has two asperities, one near the hypocenter and the other relatively far from the hypocenter to the northwest. All the results are consistent with each other and represent that directivity effect exists to the northwest. Slip pattern of this event provides an evidence of complex source process of moderate earthquakes.

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Authors and Affiliations

  1. National Institute of Meteorological Research, Korea Meteorological Administration, 45 Gisangcheong-gil, Sindaebang-dong, Dongjak-gu, Seoul, 156-720, Republic of Korea

    Sun-Cheon Park

  2. Korea Meteorological Administration, 45 Gisangcheong-gil, Sindaebang-dong, Dongjak-gu, Seoul, 156-720, Republic of Korea

    In-Kyeong Hahm

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  1. Sun-Cheon Park
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  2. In-Kyeong Hahm
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Correspondence to Sun-Cheon Park.

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Park, SC., Hahm, IK. Rupture pattern of a moderate earthquake in Odaesan, Korea. Geosci J 14, 191–200 (2010). https://doi.org/10.1007/s12303-010-0018-0

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  • DOI: https://doi.org/10.1007/s12303-010-0018-0

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