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基于周期谱分析基础上的线性合成概率预测方法,对青藏高原北部地区Ms≥7.0、Ms≥6.5强震进行了试验性研究,并利用其结果作为预测依据,对青藏高原北部地区强震趋势做了初步估计.利用该方法,本文还对东昆仑断裂带1900年以来的Ms≥7.0强震进行了研究. 相似文献
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应用检测地震活动水平相对变化的区域-时间-长度算法（RTL算法）,分析研究了青海地区有相对较完备小震资料的14次6级以上震例。结果表明,该区6级以上地震发生前在源区或近源区大约120km半径的空间尺度内,‰值能检测到明显的1年内和2年内时间尺度的中期地震活动异常,地震活动增强的“上升型”异常和地震活动平静的“下降型”异常各占一半。 相似文献
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总结了兴海6．6级地震前青海东部电磁学科所反映的异常特征，并对兴海地震的孕震过程予以初步的分析。 相似文献
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通过对青藏高原北部地区前兆观测手段共88个台点的资料系统分析、整理、汇总,认为在昆仑山口西8．1级地震中短期内前兆异常具有明显的特征,并认为8．1级地震的发生不仅仅是大构造断裂带活动的产物,更是在某种特殊的力源作用下,大区域构造应力发生显变化,并在几条边界构造大断裂的相互作用下发生的1次强震活动。 相似文献
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The authors studied the seismic activity, precursory anomalies and abnormal animal behavior before the April 14, 2010 MS7.1 Yushu earthquake. Analysis showed that anomalies were not rich before the MS7.1 Yushu earthquake, but prominent anomalies were observed, such as the long and mid-term trend anomaly characterized by the seismic quiescence of MS6.0, MS5.0 and MS4.0 earthquakes, and the anomalies in precursor observation of surface water temperature in Yushu and Delingha and electromagnetic measurement in Pingan. There were a large number of animal behavior anomalies appearing one week before the earthquake. An M4.7 earthquake occurred 130 minutes before the main shock. In this paper, we studied the dynamic process of the Yushu earthquake preparation using the earthquake focal mechanism solutions on the Bayan Har block boundary since 1996. The results show that the Kalakunlun M7.1 earthquake in 1996, the Mani M7.5 earthquake and the Yushu MS7.1 earthquake have the same dynamic process. Long and mid-term trend anomalies may be related to the dynamics of evolution of different earthquakes. This paper also discusses the recurrence interval of strong earthquakes, foreshock identification and precursor observation of the Yushu MS7.1 earthquake. 相似文献
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