| A Preliminary Study on Seismicity and Stages of Seismic Energy Accumulation in Seismotectonic Regions of Tianshan |
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| 作者姓名： | Li Yingzhen |
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| 作者单位： | Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China |
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| 基金项目： | 国家自然科学基金;地震科学联合基金;新疆乌鲁木齐市高技术研究发展计划 |
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| 摘 要： | INTRODUCTIONStudy on active tectonics shows that large earthquake in seismogenic tectonics will recur in situperiodically.These large earthquakes that recur periodically are called“characteristic earthquakes”.( Wallace , et al ., 1984 ; Nishenko, 1987) . However , several sub-strong earthquakes and manymoderate-small earthquakes will occur in the interval between two temporally adjacent characteristicearthquakes,i .e .in a complete recurrence cycle (Shen Jun,et al .,1995 ,1999 ,2004) .…
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| 关 键 词： | 地震 能量 活动性 天山 震源物理 |
| 收稿时间： | 2005-03-23 |
| 修稿时间： | 2005-12-16 |
A Preliminary Study on Seismicity and Stages of Seismic Energy Accumulation in Seismotectonic Regions of Tianshan |
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| Li Yingzhen.A Preliminary Study on Seismicity and Stages of Seismic Energy Accumulation in Seismotectonic Regions of Tianshan[J].Earthquake Research in China,2006,20(2):174-189. |
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| Authors: | Li Yingzhen |
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| Institution: | Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China |
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| Abstract: | Using seismic parameters, the characteristics of the seismic activity in various seismotectonic regions of Tiaushan were studied in this paper. These regions are going through different stages of seismic energy accumulation. Current seismic risk levels of these areas were analyzed synthetically by the tectonic movement rates, as well as the characteristics of the seismic activity and the recurrence intervals of strong earthquakes. We preliminarily studied the characteristics of seismic activity in different seismic energy accumulating stages. The result shows that the characteristics of the seismic activity in various seismotectonic regions of the Tiaushan area are influenced, not only by the regional tectonic movement, but also by the energy accumulating stage of various seismic tectonics. In the intense tectonic movement areas, it is important to estimate its stage of energy accumulating in order to predict the upper limit of the potential earthquake magnitude. In the less intense tectonic movement areas, the estimating of the stage of energy accumulation will help us recognize the dangerous level of the potential strong earthquake. The study shows that the seismotectonic regions in southern Tiaushan have reached the mid-stage and late-stage of energy accumulation, with a higher seismic activity and thus a higher seismic dangerous level than those in the northern and middle Tiaushan. The earthquake risk of southern Tianshan is up to Ms7.0, while that of the middle Tiaushan is up to Ms6.0 and that of northern Tiaushan is only around Ms5.0 - 6.0. |
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| Keywords: | Tianshan Stage of the seismic energy accumulation Seismic activity |
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