| 门源6.4级、共和7.0级地震前后波速比变化特征 |
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| 引用本文： | 都昌庭,徐兰芬,冀金梅.门源6.4级、共和7.0级地震前后波速比变化特征[J].高原地震,1997(2). |
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| 作者姓名： | 都昌庭 徐兰芬 冀金梅 |
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| 作者单位： | 青海省地震局!西宁，810001，青海省地震局!西宁，810001，青海省地震局!西宁，810001 |
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| 摘 要： | 通过来用门源台、湟源台所记录的地震资料，对1986年门源6．4级地震、1990年共和7．0级地震前后进行波速比-时空分析，发现两次地震前后其时间分布形态为持续低值-恢复-发震的现象，空间分布为圆形、椭圆形的异常区，震后异常区消失。
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| 关 键 词： | 地震波速比 低值异常 门源地震 共和地震 |
VARIATION FEATURES OF SEISMIC WAVE VELOCITY RATIO BEFORE MENYUAN Ms 6. 4 AND GONGHE Ms 7.0 EARTHQUAKES |
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| Du Changtion, Xu Lanfen, Ji Jinmei.VARIATION FEATURES OF SEISMIC WAVE VELOCITY RATIO BEFORE MENYUAN Ms 6. 4 AND GONGHE Ms 7.0 EARTHQUAKES[J].Plateau Earthquake Research,1997(2). |
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| Authors: | Du Changtion Xu Lanfen Ji Jinmei |
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| Abstract: | According to the seismic data recorded by Menyuan and Huangyuan stations, the authors analyse the temporal and spacial distribution features of seismic wave velocity ratio before and after Menyuan Ms 6. 4 earthquake in 1986 and Gonghe Ms 7. 0 earthquake in 1990, and find that the temporal drstribution is dropped -low value -recovery -earthquake occurrence. The spacial distribution is anomalous areaas a circle and ellipse, and recovered after earthquakes. |
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| Keywords: | Seismic Wave velocity ratio Low value anomaly Menyuan earthquake Gonghe earthquake |
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