摘要
以2010年玉树Ms7.1级地震序列为研究对象,分析该地震序列的时空分布特征,发现玉树Ms7.1级地震的余震活动主要沿着主震的发震断裂分布,并向两侧破裂扩展;震级为1到3之间的余震活动最多,且余震活动基本发生在震源深度20 km以内,其中15 km以内的余震活动占多数。在此基础上,采用最大似然估法,计算得到玉树地震序列的b值随震级、深度和时间的变化特征。
Take Yushu Ms7. 1 earthquake sequence in 2010 as the research object,the spatial-temporal characteristics of the seismic sequences are analyzed,and it is found that the aftershock activity mainly distributed along the main seismogenic fault,and expanded to the broken fault on both sides; the aftershocks of magnitudes are most between 1 to 3,and the aftershocks basically occurred within 20 km of the focal depth,and most within 15 km.Based on this,the maximum likelihood estimation method is used to calculate the variation characteristics of the b value with magnitude,depth and time.
出处
《高原地震》
2017年第4期12-17,共6页
Plateau Earthquake Research
基金
国家自然科学基金(41574043)资助
关键词
玉树MS7.1级地震
地震序列
时空特征
Yushu Ms7.1 earthquake
Seismic sequence
spatial-temporal characteristic
