昆仑山口西8.1级地震后青藏高原北部地区地震活动初步研究

PRELIMINARY RESEARCH ON THE SEISMICITY IN NORTHERN QINGHAI-XIZANG PLATEAU AFTER WEST TO KUNLUN MOUNTAIN PASS MS 8.1 EARTHQUAKE

摘要:

利用相关震例分析了昆仑山口西8.1级地震后青藏高原北部地区未来1~3年地震活动特征.结果表明,沿东昆仑构造带及邻近地区发生M_S ≥ 7.0地震后青藏高原北部地区中强地震活动有增强的趋势,祁连山地震带和东昆仑地震带的地震活动具有交替发生的特征,未来1~3年中强地震主体活动区为大型走滑活动断裂上应力转换部位和挤压会聚构造区,如东昆仑断裂带中东段和祁连山地震带中东段和西段.

Abstract:

The seismicity character in northern Qinghai-Xizang plateau after west to Kunlun Mountain Pass M_S 8.1 earthquake in future 1~3 years is analysed by using date of some previous events. The result shows that the seismicity of moderate strong earthquake in the area is strengthened after M ≥ 7.0 earthquakes along Eastern Kunlun Fault and adjacent areas,The strong shocks in Qilian Mountain and Eastern Kunlun Seismic Belts are occurred alternately. The main active regions of moderate strong earthquake are some stress transition sites and extruding-tectonic areas on great strike-slip active faults, such as mid-eastern segment of Eastern Kunlun Seismic Belt,western end and mid-eastern segment of Qilian Mountain Seismic Belt.