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| On the Features of Seismicity with Complex Network Technology |
| ZHANG Zhengshuai1, CHEN Shijun1, ZHOU Chen2, ZHAO Rui1
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1.Shandong Earthquake Agency, Ji'nan 250014, China;
2.Heilongjiang Earthquake Agency, Harbin 150000,China |
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Abstract The seismic data taken in the geographical region under consideration are mapped to a complex network-Earthquake Network. From the perspective of complex network, we describe the spatial-temporal complexity of seismicity. In this article, we construct earthquake network and investigate it. Firstly, the results show that these earthquake networks are scale-free and small-work networks with the power-law connectivity distributions. Secondly, the scale represents co-seismic effect. Moreover, nodes and edges increase greatly after the main shock. Finally, the method of k-core decomposition is applied to the earthquake network, and an important phenomenon is found that the value of the highest layer shows obvious high-value abnormalities before some earthquakes and it will return to a stable state after the earthquake. These results reveal complex intrinsic interactions between seismic events. The earthquake network, which presented certain statistical laws, will provide a new way for us to analyze and research the seismological system.
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Received: 22 May 2018
Published: 09 January 2019
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