【摘要】 根据内蒙古中西部构造及台站分布特点,从视应力的基本定义出发,选取2003年1月至2007年10月,内蒙古中部、西部地区12个地震台的2.5≤ML≤4.5级(共计129次)地震进行视应力计算,对该区域视应力背景水平及时序特征进行分析。结果表明,内蒙古中部、西部地区的视应力平均水平基本相当,该值基本上反映了内蒙古中西部地区的视应力背景水平。经对比分析,该值具有一定的可信度。研究区视应力的时间变化特征显示,需关注2004年以来内蒙古中西部地区视应力的变化发展。更多还原

【Abstract】 Based on the distributing characteristic of the stations and the structure in Midwestern inner Mongolia,according to the definition of the apparent stress,by using 129 earthquake waveform datum of 12 stations in middle and western inner Mongolia magnitude ranged from ML2.5 to ML4.5,the apparent stress in Midwestern inner Mongolia is calculated.The result shows that the average apparent stress in middle inner Mongolia and western inner Mongolia are almost similar,which basically reflects the background apparent stress level in Midwestern inner Mongolia.The temporal and spatial distribution of the apparent stress in Midwestern inner Mongolia reminds that great attention needs to be paid to earthquake potential in this area.更多还原