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Temporo-spatial Characteristics of Swarm Distribution before Two MS6.0 Earthquakes in the Tianshan Area, China and Their Application to Earthquake Prediction
Zhang Linlin,Ao Xueming
作者单位
Zhang Linlin Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China 
Ao Xueming Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China 
摘要:
The Nilka-Gongliu earthquake with MS6.0 and Xinyuan-Hejing earthquake with MS6.6 successively occurred in Xinjiang on November 1, 2011 and June 30, 2012. Massive swarm activity was observed in a large area around the main shock epicenters before the two strong earthquakes. Main features are as follows:① The swarm activities not only increased significantly in number of earthquakes, but also presented a distinct swarm gap in spatial distribution, and the epicenters of the following strong earthquakes were all located in the swarm gap. ② The duration of the swarm gap lasted longer, for 2-3 years. ③ The time-history characteristics of the swarm's cumulative frequency indicates that swarm activity was quieter a few months before the main shocks. Finally, we discuss the results as well as the issues of their application in earthquake prediction.
关键词:  Earthquake  Temporal-spatial swarm activity  Earthquake prediction
DOI:
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Temporo-spatial Characteristics of Swarm Distribution before Two MS6.0 Earthquakes in the Tianshan Area, China and Their Application to Earthquake Prediction
Zhang Linlin,Ao Xueming
Abstract:
The Nilka-Gongliu earthquake with MS6.0 and Xinyuan-Hejing earthquake with MS6.6 successively occurred in Xinjiang on November 1, 2011 and June 30, 2012. Massive swarm activity was observed in a large area around the main shock epicenters before the two strong earthquakes. Main features are as follows:① The swarm activities not only increased significantly in number of earthquakes, but also presented a distinct swarm gap in spatial distribution, and the epicenters of the following strong earthquakes were all located in the swarm gap. ② The duration of the swarm gap lasted longer, for 2-3 years. ③ The time-history characteristics of the swarm's cumulative frequency indicates that swarm activity was quieter a few months before the main shocks. Finally, we discuss the results as well as the issues of their application in earthquake prediction.
Key words:  Earthquake  Temporal-spatial swarm activity  Earthquake prediction