Measurement of Rayleigh-wave magnitudes for North Korean nuclear tests
文献类型:期刊论文
作者 | Fan Na1; Zhao Lian-Feng1; Xie Xiao-Bi2; Yao Zhen-Xing1 |
刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
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出版日期 | 2013-03-01 |
卷号 | 56期号:3页码:906-915 |
关键词 | Rayleigh-wave Magnitude Site Correction Nuclear Explosion |
DOI | 10.6038/cjg20130319 |
文献子类 | Article |
英文摘要 | We collect regional seismic data recorded at broadband seismic stations from 77 earthquakes, 3 chemical explosions and 2 nuclear explosions between 1995 and 2009 in Northeast China and its vicinity. These data are used to calibrate the regional seismic network for measuring the Rayleigh-wave magnitude. Based on vertical-component Rayleigh wave records between 8 and 25 s, we obtain the maximum-amplitude surface-wave magnitudes. Using records from 82 events, we calculate the site corrections at different period for all stations. After removing the site response, we obtain the Rayleigh-wave magnitude for individual station-event pair. Finally the network average magnitude is obtained for each event. The Rayleigh-wave magnitudes are 2. 93 +/- 0. 19 and 3. 62 +/- 0. 21 for 2006 and 2009 North Korean nuclear explosions. The comparison between the Rayleigh-wave magnitude M-s and the body wave magnitude m(b) (Lg) suggests that M-s-m(b) method is invalid in discriminating the nuclear explosions from earthquake populations in Northeast China/North Korea region and within the regional distances. The two North Korean nuclear explosions excited strong Rayleigh waves, leading to the poor performance of M-s-m(b) discrimination. The possible reasons include near-source heterogeneities, asymmetric source or existing tensile tectonic release. Given the depth of burial between 0. 01 and 1. 0 km and using the obtained Rayleigh-wave magnitudes, the yields of the 2006 and 2009 North Korean nuclear tests are estimated to be 0. 42 similar to 3. 17 kt and 2. 06 similar to 15. 53 kt, respectively. |
WOS关键词 | 9 OCTOBER 2006 ; M-S-M(B) DISCRIMINATION ; TELESEISMIC DISTANCES ; YIELD ESTIMATION ; SHORT-PERIOD ; TIME-DOMAIN ; M-S ; EXPLOSIONS ; AMPLITUDES ; SCALE |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
WOS记录号 | WOS:000317169200019 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/62662] ![]() |
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 |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Calif Santa Cruz, Inst Geophys & Planetary Phys, Santa Cruz, CA 95064 USA |
推荐引用方式 GB/T 7714 | Fan Na,Zhao Lian-Feng,Xie Xiao-Bi,et al. Measurement of Rayleigh-wave magnitudes for North Korean nuclear tests[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(3):906-915. |
APA | Fan Na,Zhao Lian-Feng,Xie Xiao-Bi,&Yao Zhen-Xing.(2013).Measurement of Rayleigh-wave magnitudes for North Korean nuclear tests.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(3),906-915. |
MLA | Fan Na,et al."Measurement of Rayleigh-wave magnitudes for North Korean nuclear tests".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.3(2013):906-915. |
入库方式: OAI收割
来源:地质与地球物理研究所
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