| Source time-function as discriminant using empirical Green’s function |
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| 引用本文： | HE Yongfeng, & CHEN Xiaofei . Department of Geophysics,School of Earth & Space Sciences,Peking University,Beijing ,China, . North-West Institute of Nuclear Technology,Xi’an ,China.Source time-function as discriminant using empirical Green’s function[J].中国科学D辑(英文版),2005,48(12):2118-2122. |
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| 作者姓名： | HE Yongfeng & CHEN Xiaofei . |
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| 作者单位： | HE Yongfeng1，2 & CHEN Xiaofei1 1. Department of Geophysics，School of Earth & Space Sciences，Peking University，Beijing 100871，China; 2. North-West Institute of Nuclear Technology，Xi’an 710024，China |
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| 摘 要： | Since the sign up of CTBT (Comprehensive Test Ban Treaty), the nuclear monitoring and distinguishing has gained great attention by the treaty countries. Seismology is one of the primary technical means available for monitoring compliance to a CTBT. However, there does not exist a single criterion, so far, that can effectively distinguish explorations from earthquakes. It has been known that source time function (abbreviated to STF) of an underground nuclear explosion contains important p…
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| 关 键 词： | target-area empirical Green’s function RSTF. |
Source time-function as discriminant using empirical Green’s function |
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| Yongfeng He and Xiaofei Chen.Source time-function as discriminant using empirical Green’s function[J].Science in China(Earth Sciences),2005,48(12):2118-2122. |
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| Authors: | Yongfeng He and Xiaofei Chen |
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| Institution: | (1) Department of Geophysics, School of Earth & Space Sciences, Peking University, 100871 Beijing, China;(2) North-West Institute of Nuclear Technology, 710024 Xi’an, China |
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| Abstract: | The source mechanism of underground nuclear explosions is remarkably different from that of earthquakes in both spatial radiation
pattern and source time-function (STF). Small underground nuclear explosions can be used as empirical Green’s functions (EGF)
to isolate the source-time spectrum of a large suspected earthquake occurred in a Nuclear Test Site (target area) by the spectral
division method. As this study shows, with high-quality data, the quotient spectrum can be transformed to the time domain,
yielding the apparent far-field source-time function of the large suspected event. The relative source time-function (RSTF)
of a nuclear explosion is usually a simple pulse with a duration of about 1 s., while an earthquake’s is more complicated
with a series of pulses and a longer duration. The RSTF can be used as a nice discriminant to distinguish the nature earthquakes
from underground nuclear explosions in target areas. |
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| Keywords: | target-area empirical Green’ s function RSTF |
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