渤海与黄河三角洲地震活动性差异初探

Primary Study on Earthquake Movement Difference in Bohai and Yellow River Delta Area

摘要:

黄河三角洲地区地震强度小,频度低,但与之相毗邻的渤海地区却是华北地区强震多发区之一,地震强度大、频度高,成为影响黄河三角洲地区地震危害性最大最严重的区域。从地震地质角度出发,通过对深部地球物理场、构造应力场、地温场及断裂活动性等方面的研究,发现渤海强震构造区与黄河三角洲在这些方面存在明显的差异,这些差异造成了两个地区在地震活动性方面的差别,渤海更具备发生强震的条件。

Abstract:

Earthquake in Huanghe delta area has small strength and low frequency, while earthquake happeded frequently in Bohai area with large strength and high frequency, which is the largest and strongest area to effect Huanghe delta area. From the geologica aspect of earthquake, and through study on geophysical field, tectonic stress field, geothermal field and fault movement, it is found that high-degree earthquake tectonic area in Bohai area has evident difference with it in Huanghe delta area. These differences..