Rupture pattern of a moderate earthquake in Odaesan, Korea

We investigated the fault geometry and slip distribution of the 2007 Odaesan, Korea, earthquake (M L 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, inc...

Full description

Saved in:
Bibliographic Details
Published in:Geosciences journal (Seoul, Korea) 2010, 14(2), , pp.191-200
Main Authors: Park, Sun-Cheon, Hahm, In-Kyeong
Format: Article
Language:English
Subjects:
Directivity
Displacement
Earth and Environmental Science
Earth Sciences
Earthquakes
Geology
Geometry
Northwest
Position (location)
Research methodology
Seismic activity
Seismic phenomena
Seismology
Slip
Stations
Waveforms
지질학
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigated the fault geometry and slip distribution of the 2007 Odaesan, Korea, earthquake (M L 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.
ISSN:1226-4806
1598-7477
DOI:10.1007/s12303-010-0018-0