从中国大陆重力潮汐观测看印尼Ms8.7地震的重力效应
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摘要
对2004年12月26日印尼Ms8.7地震前后中国重力台站的观测资料进行了分析,根据M2波潮汐因子的月变化曲线及加卸载响应比讨论了该次地震可能引起的重力趋势性变化。分析结果表明,印尼Ms8.7地震引起的M2波潮汐因子趋势性变化是明显的,但在不同地区趋势并不相同。
The gravity data at the stations of China observed before and after the Indonesia Ms8.7 earthquake occured on Dec.26,2004,are analyzed.On the basis of the monthly variation of the tidal factor of M2 wave and the response ratio to loading and unloading,the possible tendentious gravity change caused by the earthquake is discussed.The analysis shows that the tendentious change of the tidal factor of M2 wave caused by the Indonesia Ms8.7 earthquake is obvious but the trends are different for the stations in different place.
The gravity data at the stations of China observed before and after the Indonesia Ms8.7 earthquake occured on Dec.26,2004,are analyzed.On the basis of the monthly variation of the tidal factor of M2 wave and the response ratio to loading and unloading,the possible tendentious gravity change caused by the earthquake is discussed.The analysis shows that the tendentious change of the tidal factor of M2 wave caused by the Indonesia Ms8.7 earthquake is obvious but the trends are different for the stations in different place.
引文
1李瑞浩,等.中国固体潮空间向量分布特征的研究[J].地震学报,1984,6(2):223~240.
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