气候变化领域集成服务门户(CCPortal): Clustering analysis of seismicity in the space–time–depth–magnitude domain preceding the 2016 Kumamoto earthquake; Southwestern Japan

CCPortal

DOI	10.1007/s00531-020-01950-5
	Clustering analysis of seismicity in the space–time–depth–magnitude domain preceding the 2016 Kumamoto earthquake; Southwestern Japan
	Ansari K.; Bae T.-S.
发表日期	2020
ISSN	14373254
英文摘要	This analysis is an extension of the studies based on the space–time–magnitude domain nearest-neighborhood distances (ƞ) obtained from two successive earthquakes. We included epicentral depth as a parameter, and established a new analytical solution for seismicity clustering in the space–time–depth–magnitude domain. The proposed technique was applied to SW Japan seismic observation data for 2011–2018, and revealed that the temporal, spatial, and epicentral (T, R, E) components of the joint distribution for ƞ were prominently bimodal, indicating the presence of two, statistically distinct, earthquake populations. We used the Lomb–Scargle periodogram (LSP) to generate a power spectrum preceding the Kumamoto earthquake, and detected the periodic component of unequally spaced points for log10ƞ (logarithmic scale of ƞ). The LSP showed a dominant peak corresponding to the time period between foreshocks and aftershocks, due to the highest number of recorded ƞ observations. The technique presented in this paper can be applied globally for any time period and any seismotectonic zone preceding large earthquakes of interest. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Earthquake clustering; Seismic depth; Southwestern Japan
语种	英语
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147744
作者单位	Department of Geoinformation Engineering, Sejong University, Seoul, 05006, South Korea
推荐引用方式 GB/T 7714	Ansari K.,Bae T.-S.. Clustering analysis of seismicity in the space–time–depth–magnitude domain preceding the 2016 Kumamoto earthquake; Southwestern Japan[J],2020.
APA	Ansari K.,&Bae T.-S..(2020).Clustering analysis of seismicity in the space–time–depth–magnitude domain preceding the 2016 Kumamoto earthquake; Southwestern Japan.International Journal of Earth Sciences.
MLA	Ansari K.,et al."Clustering analysis of seismicity in the space–time–depth–magnitude domain preceding the 2016 Kumamoto earthquake; Southwestern Japan".International Journal of Earth Sciences (2020).