摘要
利用新疆区域数字化观测资料,计算了2011—2015年新疆3次6级地震序列的视应力值,并对视应力和震级的关系进行了讨论。结果表明:(1)主震视应力值高于余震视应力值,余震视应力和震级有一定的正相关关系;(2)主震后稍短时间内,视应力均处于整个序列的高值阶段,且在高值阶段会有较强余震发生,这可能是受到震后应力调整的影响;(3)强余震前,会出现视应力高值现象,强余震发生后,后续视应力值恢复到低值水平。计算了2016年底阿克陶6.7级和呼图壁6.2级地震余震视应力,目前阿克陶6.7级地震余震视应力处于高值状态,呼图壁6.2级地震余震视应力处于低值状态,对比研究5次余震视应力的值,对阿克陶6.7级和呼图壁6.2级地震序列类型进行了判定并对后续余震做了预测。
Based on seismic data recorded by the Xinjiang Digital Seismic Network, we cal culated apparent stressses of three Ms6.0 earthquake sequences occurred in 2011-2015. The results show that ① the apparent stresss of the major earthquake is higher than aftershock earthquakes, and there is positive correlation between apparent stresss and earthquake magnitude; ② in a short period of time after the main shock, apparent stress is higher in the sequence and strong aftershock occurred possibly due to stress adjustment af- ter strong earthquake; ③ the apparent stress before strong aftershock earthquake is higher, and come back to low level after strong aftershock. We calculated apparent stresss of Aketao Ms6.7 and Hutubi Ms6. 2 earthquake sequences, and the apparent stress of the Ms6.7 earthquake at present is high, but the apparent stress of the Ms6.2 earthquake is low. We compared the apparent stresses of five earthquake equences, and judged the seis- mic sequence type and maked aftershock predictions of the two earthquakes.
作者
郭寅
王琼
GUO Yin WANG Qiong(Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, Xinjiang, China)
出处
《地震》
CSCD
北大核心
2017年第3期169-179,共11页
Earthquake
基金
2017年度震情跟踪定向工作任务(青年)(2017010126)
新疆地震科学基金(201502)联合资助
