初始震源深度对双差定位结果的影响分析
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摘要
选取芦山M7.0地震余震中初始震源深度在10~15 km范围内的地震,通过将震源深度减小5 km、增加5 km和直接固定震源深度的方法,获得不同的震源深度值来作为初始震源深度,采用双差定位法分别对不同初始震源深度地震进行重新定位,并对定位结果的震源位置进行对比分析。通过计算,认为初始震源深度误差对双差定位结果的震中位置影响比较小,但对震源深度结果却存在一定的影响。
In this article we select the aftershocks of Lushan M7. 0 Earthquake with their initial focal depths of 10 ~15 km. We use the fixed focal depth,and the methods with the focal depth of reducing and increasing by 5 km to relocation these seismic events with the method of the double difference. We compare the results and find that the initial focal depths of the earthquake has a little effect to the relocation with the method of double difference but has some of effect to the focal depths.
引文
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