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当前在震后快速响应阶段的盲场快速评估过程中,震中位置普遍采用速报震中,而速报震中与实际宏观震中之间存在客观的不一致性,会给震灾评估结果带来较大的误差。而在震后短时间内可用信息量极少的情况下,判断宏观震中的位置存在较大的困难,本文通过引入余震法,为震后快速判定宏观震中提出了新的思路。通过对1970年以来近40组破坏性地震的研究,利用余震法可在震后6h根据地震破裂性质推断宏观震中,其准确度、时效性都能为震后快速评估提供较为可靠的依据。
At present, in the rapid assessment of the blind field during the rapid response phase after a quake, the epicenter of the epicenter usually adopts the epicenter of the ephemeris while there is an objective inconsistency between the epicenter of the epicenter and the actual macroscopic epicenter, which results in a larger error. However, there is great difficulty in judging the position of macro epicenters in the short time after the earthquake. By introducing the aftershock method, this paper presents a new idea for the rapid determination of macro epicenter after the earthquake. According to the research on nearly 40 sets of destructive earthquakes since 1970, the aftershock method can be used to infer the macro epicenter based on the seismic rupture 6h after earthquake, and its accuracy and timeliness can provide a reliable basis for rapid post-earthquake assessment.