| 甘肃近期2次中强震前后震源区微震尾波（Qc）的变化特征 |
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| 引用本文： | 荣代潞,李亚荣.甘肃近期2次中强震前后震源区微震尾波（Qc）的变化特征[J].高原地震,2000,12(2):11-24. |
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| 作者姓名： | 荣代潞 李亚荣 |
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| 作者单位： | 中国地震局兰州地震研究所,甘肃兰州 |
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| 基金项目： | 地震科学联合基金重点项目!( 95- 0 7- 436 )资助 |
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| 摘 要： | 利用张掖台网和天祝－古浪台网的记录资料研究了１９８８年１１月２２日肃南５．７级地震和１９９６年６月１日天祝－古浪５．４级地震前台震源区微震尾波Ｑｃ值的变化特征，结果表明：５．７级地震前源及邻近地区介质１／Ｑｃ值趋于一致，认为这是该次地震的一种前兆表现，结合该次地震的震源机制和构造情况进行了讨论。天祝－古浪５．４级地震震源区附近地区微震尾波Ｑｃ值民频率的关系表明，这一地区属于构这活动地区。
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| 关 键 词： | 中强地震 微震尾波 1／Qc 甘肃 震源区 地震波 |
STUDY ON THE VARIATION CHARACTERISTICS OF CODA Q_c VALUES OF THE MICRO-EARTHQUAKES IN THE SOURCE AREA BEFORE AND AFTER TWO MODERATE STRONG EARTHQUAKES IN GANSU PROVINCE |
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| RONG Dai Lu,LI Ya rong,JIN Ming,HE Yu ting.STUDY ON THE VARIATION CHARACTERISTICS OF CODA Q_c VALUES OF THE MICRO-EARTHQUAKES IN THE SOURCE AREA BEFORE AND AFTER TWO MODERATE STRONG EARTHQUAKES IN GANSU PROVINCE[J].Plateau Earthquake Research,2000,12(2):11-24. |
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| Authors: | RONG Dai Lu LI Ya rong JIN Ming HE Yu ting |
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| Abstract: | The variation characteristics of the coda Q c values of micro earthquakes in the source areas before and after two earthquakes.The two events are Sunan earthquake(M5.7,Nov.22,1988)and Tianzhu Gulang earthquake(M5.4,June 1,1996).The results show that the 1/Q c values tend to identity in the source and its near area before the earthquake M5.7.It is considered that it is a precursor before the earthquake and discussed combining with the source mechanism of this earthquake and the tectonics in the area. The relation between the coda 1/Q c values near the source area of Tianzhu Gulang earthquake and the frequencies have been studied,it shows that the studied area belongs to active tectonic area. |
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| Keywords: | Moderate earthquake Coda of micro earthquake Value of 1/Q c |
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