Journal of the Geological Society of Korea (지질학회지)

The Geological Society of Korea (대한지질학회)
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Seismotectonic zoning by K-means clustering analysis in the Korean Peninsula

K-평균 군집분석에 의한 한반도에서의 지진지체구조구 구분

  • Kim, Sung Kyun (Department of Earth Systems and Environmental Sciences, Chonnam National University) ;
  • Jeon, Jeong Soo (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Jun, Myung-Soon (Earthquake Research Center, Korea Institute of Geoscience and Mineral Resources)
  • Received : 2017.07.03
  • Accepted : 2017.09.06
  • Published : 2017.10.13
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Abstract

It is not easy to identify seismic source zone for use in probabilistic seismic hazard analysis in the intraplate region. There is no unique formal procedure for developing and evaluating seismic source models. The K-means cluster analysis is applied to seismicity data as a point source to delineate seismotectonic model for the Korean Peninsula in this study. The number of clusters K determined by KL index and Elbow methods appears to be five and nine, respectively. A seismotectonic model composed of five source zones is developed and an alternative model with nine zones is also proposed. Seismicity parameters estimated in each zone are presented.

지진활동이 활발하지 않은 판내부 지역에서는 확률론적 지진재해도 분석에 사용되는 지진원의 설정이 용이하지 않다. 지진원 모델을 설정하고 평가하는 유일무이한 공식적인 방법은 존재하지 않는다. 이 연구에서는 개개의 지진을 점지진원으로 가정한 지진활동 자료를 K-평균 군집분석에 적용하여 한반도의 지진지체구조도를 작성하였다. KL 지수법과 Elbow법에 의해 결정된 군집수 K는 각각 5개와 9개로 나타났다. 5개의 구조구로 구성된 지진지체구조구 모델과 9개로 구성된 대체 모델이 작성되었다. 각각의 구조구에 대하여 추정된 지진활동 상수들이 제시되었다.

Keywords

Acknowledgement

Grant : HLW 지층처분 후보부지 선정을 위한 전국규모 지질환경정보도 작성

Supported by : 한국지질자원연구원

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