| Determination of Earthquake Fracture Feature by Using the Directional Function |
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| 作者姓名： | Liu Wenlong Wu Peizhi and Chen YuweiSeismological Bureau of Annul Province Hefei China |
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| 作者单位： | Liu Wenlong，Wu Peizhi，and Chen YuweiSeismological Bureau of Annul Province，Hefei 230031，China |
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| 摘 要： | In this paper,a new method for determining the earthquake fracture feature is put forward.The generalized directional function DG is defined as the ratio of P waveamplitude spectrums recorded at station 1 and station 2 by comparisonof the recorded DG curve and the theoretical curve,the ratio of fracture lengths of a bilateral fracture in two opposite directions and the angle between station 1 and the main rupture propagating direction can be determined simultaneously.Theoretically speaking,only records of three stations distributed homogeneously are needed to determine the fracture feature of an earthquake.The main rupturing propagating direction of a strong aftershock(ML5.4)of the Tangshan earthquake(Ms7.8)has been obtained by using the new method and has been compared with the result of the earthquake source mechanism.This shows that this new method is effective.
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Determination of Earthquake Fracture Feature by Using the Directional Function |
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| Liu Wenlong,Wu Peizhi,and Chen YuweiSeismological Bureau of Annul Province,Hefei ,China.Determination of Earthquake Fracture Feature by Using the Directional Function[J].Earthquake Research in China,1996(3). |
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| Authors: | Liu Wenlong Wu Peizhi and Chen YuweiSeismological Bureau of Annul Province Hefei China |
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| Institution: | Liu Wenlong,Wu Peizhi,and Chen YuweiSeismological Bureau of Annul Province,Hefei 230031,China |
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| Abstract: | In this paper,a new method for determining the earthquake fracture feature is put forward.The generalized directional function DG is defined as the ratio of P waveamplitude spectrums recorded at station 1 and station 2 by comparisonof the recorded DG curve and the theoretical curve,the ratio of fracture lengths of a bilateral fracture in two opposite directions and the angle between station 1 and the main rupture propagating direction can be determined simultaneously.Theoretically speaking,only records of three stations distributed homogeneously are needed to determine the fracture feature of an earthquake.The main rupturing propagating direction of a strong aftershock(ML5.4)of the Tangshan earthquake(Ms7.8)has been obtained by using the new method and has been compared with the result of the earthquake source mechanism.This shows that this new method is effective. |
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| Keywords: | Seismic rupture Source parameter Fracture feature |
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