日本海板块俯冲与中国东北地震

SUBDUCTION OF THE PACIFIC PLATE IN THE SEA OF JAPAN AND EARTHQUAKES OF NORTHEAST CHINA

利用日本海区丰富的震史资料,研究了该区强震活动时—空变化的某些特征,并以此为据,将1900年以来的地震活动划分了三个地震轮回,同时还分析了各轮回的强震地区分布及其持续时间。分析了中国东北地区深震(mb≥6.0)及浅震(MS≥5.0)的成组性活动特征,研究了日本海西部深震与中国东北地区浅震的相关性。这些结果可作为研究日本海区强震高潮到来和结束的标志以及为判断未来主体活动区等强震预测问题提供线索。

By using the rich historical earthquake data, the author studied some features of temporal and spatial variation of strong seismicity in the Sea of Japan, According to the seismicity since 1900 three seismic cycles are divided, The duration time and the regional distribution of strong earthquakes for each cycle are discussed in the paper. Based on the analyses of grouped activities of deep focus （Ms ≥6.0 ） and shallow- focus （Ms ≥5.0 ） earthquake in Northeast China, the spatial and temporal correlation between the deep focus ＂strong earthquake group＂ and shallow-focus ＂strong earthquake group＂ was studied. The research results may be used to the marks for beginning and ending of the high tide period of strong earthquakes to a certain extent.