| Simulation of the active and quiet periods of seismicity |
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| 作者姓名： | 黄忠贤 |
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| 作者单位： | Institute of Crustal Dynamics，State Seismological Bureau，Beijing 100085，China |
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| 摘 要： | ＳｉｍｕｌａｔｉｏｎｏｆｔｈｅａｃｔｉｖｅａｎｄｑｕｉｅｔｐｅｒｉｏｄｓｏｆｓｅｉｓｍｉｃｉｔｙＺＨＯＮＧ－ＸＭＮＨＵＡＮＧ（黄忠贤）（ＩｎｓｔｉｔｕｔｅｏｆＣｒｕｓｔａｌＤｙｎａｍｉｃｓ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉｊｉ...
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| 收稿时间： | 19 June 1995 |
| 修稿时间： | 9 October 1995 |
Simulation of the active and quiet periods of seismicity |
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| ZHONG-XMN HUANG.Simulation of the active and quiet periods of seismicity[J].Acta Seismologica Sinica(English Edition),1996,9(2):245-253. |
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| Authors: | ZHONG-XMN HUANG |
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| Institution: | (1) Institute of Crustal Dynamics, State Seismological Bureau, 100085 Beijing, China |
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| Abstract: | In this paper we simulate the repeated occurrence of strong earthquakes along a strike-slip fault by using a finite element model. The fault valve mechanism is included in the model in order to take into account the effeCt of POre fluid pressure variation. Five parameters are used to characterize the rheology of the fault, POre pressure variation, and fracture criteria. By Systematically varying these parameters and calculating a large number of models we carried out a preliminary investigation on the alternatively quiet and active periods of seismicity and their relation to model Parameters and loading conditions. Under the action of a constant-rate boundary movement, in the case of intermediate stress and pore pressure, the models display a regular quiescence-activity phenomenon with a cycle length of 1/3-1 of the recurrence pened. When the model is under high stress or high pore pressure, this phenomenon becomes irregular or inexplicit. When the model is subject to periedic boundary forces and the amplitude of force variation is not too small, it results in an alternatively quiet and active seismicity Pattern with the same Period Of the force variation. |
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| Keywords: | earthquake model finite element method seismicity active Period quiet period |
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