The seismic characterization of North Korea underground nuclear tests

doi:10.6038/cjg2018L0677

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	The seismic characterization of North Korea underground nuclear tests
	Xie Xiaobi 1; Zhao Lianfeng 2,3
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2018-03-01
卷号	61 期号:3 页码:889-904
关键词	Underground Nuclear Test Discrimination Relative Location Yield Estimation North Korea
ISSN号	0001-5733
DOI	10.6038/cjg2018L0677
文献子类	Article
英文摘要	Since 2006, North Korea (DPRK) conducted 6 underground nuclear tests at the test site located near the China-North Korea border. These explosions generated abundant broad band digital seismograms within regional distances. These seismograms show typical features of shallow explosions. Processing methods for event discrimination, yield estimation, and relocation of epicenters were developed to investigate these explosions. The spectral ratios Pg/Lg, Pn/Lg, and Pn/Sn were calculated for all 6 explosions and 4 nature earthquakes. The results show that network averaged P/S type spectral ratios can unambiguously separate explosions from natural earthquakes. With this method, a regional network can effectively monitor nuclear tests of 0.5 kt or larger in the Korea Peninsula. The results also revealed that the m(b)-M-S magnitude ratio cannot effectively discriminate the explosion and earthquake sources in this region. A body wave magnitude system based on regional phase Lg was created for the Northeast China-North Korea border region. Based on this method, the Lg wave magnitudes of these nuclear tests were calculated and their seismic yields were estimated ranging between 0.5 and 60 kt. Due to lack of depth of burial information, these yields may be underestimated. Further investigation of the depth effect on yield estimation is suggested. Using the location of the first nuclear test as a reference, the epicenters of other explosions were relocated using a high-precision relative location method.
WOS关键词	SURFACE-WAVE MAGNITUDE ; HIGH-PRECISION LOCATION ; OCTOBER 2006 ; CENTRAL-ASIA ; TEST-SITE ; TELESEISMIC DISTANCES ; SOURCE DISCRIMINATION ; YIELD ESTIMATION ; UPPER-MANTLE ; TIME-DOMAIN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000428609900008
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88354]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Xie Xiaobi
作者单位	1.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Xie Xiaobi,Zhao Lianfeng. The seismic characterization of North Korea underground nuclear tests[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(3):889-904.
APA	Xie Xiaobi,&Zhao Lianfeng.(2018).The seismic characterization of North Korea underground nuclear tests.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(3),889-904.
MLA	Xie Xiaobi,et al."The seismic characterization of North Korea underground nuclear tests".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.3(2018):889-904.