| 形变有震短临异常的演化特征 |
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| 引用本文： | 张跃刚,王占勇,李进步.形变有震短临异常的演化特征[J].华北地震科学,2000,18(2):35-40. |
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| 作者姓名： | 张跃刚 王占勇 李进步 |
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| 作者单位： | 1. 河北省地震局,石家庄,050021
2. 河北省地震局丰宁地震台,068350 |
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| 摘 要： | 分析了７个形迹有震异常的震例，通过分析归纳出了形迹有震短临异常的五个基本形态特征：（１）异常初期快速突变；（２）异常在发震前一般都恢复，在突变期间一般不发震；（３）发震时间一般在异常出现恢复一个月以内；（４）震级与异常幅度之间无明显数量关系；（５）异常范围一般为２００ｋｍ左右。在特征分析的基础上，进一步探讨了形迹短临前兆异常上述特征的物理机制。
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| 关 键 词： | 形变 短期地形变前兆 临震预报 地震前兆 |
| 修稿时间： | 1999-09-15 |
DEVELOPING CHARACTER OF CRUSTAL DEFORMATION IMMINENT ANOMALIES BEFORE SOME EARTHQUAKES |
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| Zhang Yuegang,Wang Zhangyong,Li Jinbu.DEVELOPING CHARACTER OF CRUSTAL DEFORMATION IMMINENT ANOMALIES BEFORE SOME EARTHQUAKES[J].North China Earthquake Sciences,2000,18(2):35-40. |
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| Authors: | Zhang Yuegang Wang Zhangyong Li Jinbu |
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| Abstract: | Seven crustal deformation anomalies before some earthquakes are analyzed in this paper.Through analysis five basic shape characters are summed up,which are:(1)suddenly change in the early stage;(2)anomalies usually recover before the occurrence of an earthquake and the quake usually does not occur during the sudden change period;(3)the quake occurrence time is usually at about one month after the anomalies recovered;(4)magnitude of the earthquake has no obvious corresponding with the extent of the anomalies quantitatively;(5)the effective radius of the anomaly is about 200 kilometers.Based on the analysis,we further discussed the physical mechanism for the shape characters of the anomalies. |
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| Keywords: | deformation short term crustal deformation precursor impending earthquake prdiction |
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