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http://dx.doi.org/10.5467/JKESS.2019.40.3.272

A Preliminary Study on Micro-earthquakes Occurred from 2010 to 2017 in Busan, Korea  

Yoon, Soheon (Department of Geological Sciences, Pusan National University)
Han, Jongwon (Department of Geological Sciences, Pusan National University)
Won, Deokhee (Coastal & Ocean Engineering Division, Korea Institute of Ocean Science & Technology)
Kang, Su Young (Institute of Geological Hazard and Industrial Resources, Pusan National University)
Ryoo, Yong Gyu (Cheongju Branch Office of Meteorology)
Kim, Kwang-Hee (Department of Geological Sciences, Pusan National University)
Publication Information
Journal of the Korean earth science society / v.40, no.3, 2019 , pp. 272-282 More about this Journal
Abstract
Although the knowledge of current seismicity is a critical information for making and implementing effective earthquake-related policy, the detailed seismicity information of the metropolitan areas with high-population density has been largely underestimated due to the high-level of cultural noise and small earthquake magnitude. This study presents 12 earthquakes including 2 earthquakes previously known and 10 additional earthquakes occurred from 2010 to 2017 in Busan, but they were unreported by the Korea Meteorological Administration. Matched filter technique is used to detect micro-earthquakes. Although the epicenters of micro-earthquakes though present a distinguished linearity, a correlation with faults in the area is unknown. A repeated micro-seismicity suggests that there are subsurface structures responsible for observed events. If large earthquakes occur along the fault in Busan, they may cause catastrophic natural disasters. Given the fact that the recent earthquakes did not accompany any surface signatures, it is highly recommended that the current micro-seismicity be investigated, and updated seismicity information be incorporated into establishing active fault maps in Korea.
Keywords
Earthquakes; micro-earthquake detections; faults; seismic hazards in the metropolitan areas;
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Times Cited By KSCI : 8  (Citation Analysis)
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