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Huang Yun,Tian Jianming,Miao Ali
Author NameAffiliation
Huang Yun Earthquake Administration of Jiangsu Province, Nanjing 210014,China 
Tian Jianming Earthquake Administration of Jiangsu Province, Nanjing 210015,China 
Miao Ali Earthquake Administration of Jiangsu Province, Nanjing 210016,China 
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The Characteristics of Earthquake Swarms in and around Jiangsu Province
Huang Yun,Tian Jianming,Miao Ali
Abstract:
This paper systematically analyzed 36 earthquake swarms in and around Jiangsu Province, summarized their characteristics and discussed the relationship between earthquske swarms and subsequent strong earthquakes. It also analyzed the judgment criteria for precursory earthquake swarms. Earthquake swarms in Jiangsu Province are concentrated in several areas. Most of them were of magnitude ML2.0~3.9. For most earthquake swarms, the number of earthquakes was less than 30. Time duration for about 55% of earthquake swarms was less than 15 days. The biggest magnitude of one earthquake swarm was not proportional to the number of earthquakes and time duration. There are 78% of earthquake swarms corresponded to the forthcoming earthquakes of M>4.6 in which there're 57% occured in one year, This shows a medium-and short-term criterion. Distance between earthquake swarm and future earthquake was distributed dispersedly. There were no earthquakes occurring in the same location as earthquake swarms. There was no good correlation between the magnitude and the corresponding rate of future earthquakes and the intensity of earthquake swarms. There was also no good correlation between the number of earthquakes in an earthquake swarm and the corresponding rate. The study also shows that it's better to use U-p or whole-combination to determine the type of earthquake swarm.
Key words:  Jiangsu and its adjacent area  Earthquake swarms  Characteristics of earthquake swarms  Criteria for precursory earthquake swarm