| 1989年12月25日侯马4.9级地震的地震学前兆 |
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| 引用本文： | 杜兴信.1989年12月25日侯马4.9级地震的地震学前兆[J].山西地震,1991(2):31-34. |
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| 作者姓名： | 杜兴信 |
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| 作者单位： | 陕西省地震局 |
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| 摘 要： | 总结了1989年侯马4.9Ms地震的地震学前兆。结果表明震前1～2年至几年200km内b值、小震频度出现下降,震中区小震条带出现空段,集中度下降。缺震曲线和分数维值也出现异常。在此基础上讨论了该次地震的发生过程及该区今后的趋势。
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| 关 键 词： | 地震 前兆 侯马市 |
The Seiemologic precursor of the Earthquake of mag. 4.9 in Houma Area |
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| Du Xingxin.The Seiemologic precursor of the Earthquake of mag. 4.9 in Houma Area[J].Earthquake Research in Shanxi,1991(2):31-34. |
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| Authors: | Du Xingxin |
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| Institution: | Seismological Bureau of Shaanxi Prov |
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| Abstract: | This is a summary of the seismologic precursor of the earthquake of mag. 4.9 occurred in Houma area in 1989, which shows tha decrease of the fa value within 200 km for the past 1-2 or even more years and the frequency of small quakes , the abnormality of spectral curve and fractional microvalue. It discusses the processes of the earthquake and the quake trend after it. |
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| Keywords: | Houma seismology precursor |
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