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Seismicity boundary depth of China mainland

机译:中国大陆地震边界深度

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The boundary between upper and lower seismogenic layers, below which large earthquakes tend to occur, is very important to estimate future seismic hazards. To estimate the depth of the seismogenic boundary, this study analyzes more than 38,000 earthquakes ( M? ≥? 2.5) that occurred in mainland China from 2008 to 2016. Assuming Gutenberg-Richter distributions, a significant change of? b -value was ob- tained at about the depth range of 9 km, as observed in California. East China, as a region of reliable depth, also shows the same bound- ary of 9 km with frequent occurrence of large earthquakes ( M? 5).
机译:上下地震发生层之间的边界(往往会在该边界以下发生大地震)对于估计未来的地震危害非常重要。为了估计地震发生边界的深度,本研究分析了2008年至2016年间在中国大陆发生的38,000多次地震(M?≥?2.5)。假设古腾堡-里希特分布,?如在加利福尼亚观察到的,在大约9 km的深度范围内获得了b值。华东作为一个可靠的深度区域,也显示了相同的9 km边界,并经常发生大地震(M?> 5)。

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