Regional Seismic Characteristics of the 9 October 2006 North Korean Nuclear Test

Regional Seismic Characteristics of the 9 October 2006 North Korean Nuclear Test
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2006 年 10 月 9 日朝鲜核试验的区域地震特征

DOI:
10.1785/0120080128
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发表时间:
2008-12
影响因子:
3
通讯作者:
Yao Zhen-Xing
Yao Zhen-Xing
中科院分区:
地球科学3区
文献类型:
--
作者:
Zhao Lian-Feng;Xie Xiao-Bi;Wang Wei-Min;Yao Zhen-Xing

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我们调查了2006年10月9日朝鲜核试验的区域地震特征。在2000年12月至2006年10月期间获得了核试验和试验场附近一组地震的宽带区域数据。从台站到试验场的震中距离在371至1153公里之间。我们首先使用这些区域事件来校准网络中的Lg波震级。然后用该网络对朝鲜核爆炸的mbLg = 3:93进行了计算.使用修正的完全耦合震级-当量关系,朝鲜核试验的当量估计为0.48千吨。由于震源深度存在很大的不确定性,这一估计是初步的。计算了核爆炸和试验场附近一组地震的P= S型谱比Pg=Lg、Pn=Lg和Pn=Sn。在2 Hz以上的频率下,网络平均P=S谱比清楚地将2006年10月9日的爆炸与区域地震分开。我们的结果表明,在朝鲜地区的一个单一的爆炸爆炸显示出不同的地震特征,从地震。在这一地区引爆的任何耦合良好的单爆爆炸,其当量与北朝鲜核试验的当量相似,都有很大的可能性被本研究所采用的区域地震网络所识别。
We investigate the regional seismic signature of the 9 October 2006 North Korean nuclear test. Broadband regional data for the nuclear test and a group of earthquakes close to the test site were obtained between December 2000 and No- vember 2006. Epicentral distances from the stations to the test site are between 371 and 1153 km. We first use these regional events to calibrate the Lg-wave magnitude in the network. Then the network is used to calculate mbLg �� 3:93 for the North Ko- rean nuclear explosion. Using a modified fully coupled magnitude-yield relation, the yield of the North Korean nuclear test is estimated to be 0.48 kt. Because of large uncertainties in the source depth, the estimate is preliminary. The P=S-type spectral ratios Pg=Lg, Pn=Lg, and Pn=Sn are calculated for the nuclear explosion and a group of earthquakes close to the test site. At frequencies above 2 Hz, the network-averaged P=S spectral ratios clearly separate the 9 October 2006 explosion from the regional earthquakes. Our result indicates that a single-blast explosion in the North Korea re- gion shows different seismic characteristics from an earthquake. Any well-coupled single-blast explosion detonated in this region with yield similar to that for the North Korean nuclear test has a large probability of being identified by a regional seismic network such as the one adopted in this study.
DOI: --
发表时间: 2007-07
期刊: --
影响因子: --
作者:
R. Herrmann;W. Walter;M. Pasyanos
通讯作者: R. Herrmann;W. Walter;M. Pasyanos
DOI: 10.1111/j.1365-246x.2005.02663.x
发表时间: 2005-10
影响因子: 2.8
作者:
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通讯作者: H. Patton;J. Schlittenhardt
DOI: --
发表时间: 1991-04
影响因子: 3
作者:
J. R. Bowman;B. Kennett
通讯作者: J. R. Bowman;B. Kennett
DOI: 10.1029/2007eo140002
发表时间: 2007-04
期刊: Eos, Transactions American Geophysical Union
影响因子: --
作者:
Won-Young Kim;P. Richards
通讯作者: Won-Young Kim;P. Richards