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http://dx.doi.org/10.5467/JKESS.2007.28.2.202

Relation of Intensity, Fault Plane Solutions and Fault of the January 20, 2007 Odaesan Earthquake (ML=4.8)  

Kyung, Jai-Bok (Department of Earth Science Education, Korea National University of Education)
Huh, Seo-Yun (Department of Earth Science Education, Korea National University of Education)
Do, Ji-Yong (Department of Earth Science Education, Korea National University of Education)
Cho, Deok-Rae (Department of Earth Science Education, Korea National University of Education)
Publication Information
Journal of the Korean earth science society / v.28, no.2, 2007 , pp. 202-213 More about this Journal
Abstract
The Odaesan earthquake $(M_L=4.8)$ occurred near Mt. Odae, Jinbu-Myon, Pyongchang-Gun, Kangwon Province on January 20, 2007. It has a shallow focal depth about 10 km. Its felt area covers most of the southern peninsula except some southern and western inland area. The maximum MM intensity was VI in the areas including Jinbu, Doam, Kangreung, Jumunjin, and Pyongchang. In these areas, there was a very strong shaking that caused several cracks on the walls of buildings and houses, slates falling off the roof, tiles being off the wall, things falling off the desk, and rock falling from the mountains. In order to get fault plane solutions, grid searches were performed by fitting distributions of P-wave first-motion polarities and SH/P amplitude ratios for each event. The results showed that the main shock represented right-lateral strike-slip sense and two aftershocks, reverse sense. It seems that the seismogenic fault may be the NNE-SSW trending Weoljeongsa fault near the epicenter based on the distribution of epicenters (foreshock, main shock, and aftershocks), damage area, and fault plane solution. The distribution of the epicenters indicates that the length of the subsurface rupture is estimated to be about 2 km.
Keywords
Odaesan earthquake; intensity; fault plane solution; strike-slip sense; seismogenic fault;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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