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| 引用本文： | 陈俊华,甘家思,李胜乐,狄莉莎,薛军蓉.??????????????????????????о?[J].大地测量与地球动力学,2007,27(3):97-105. |
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| 作者姓名： | 陈俊华 甘家思 李胜乐 狄莉莎 薛军蓉 |
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| 作者单位： | 1. 中国科学技术大学地球与空间科学学院,合肥,230026;中国地震局地震研究所,武汉,430071
2. 中国地震局地震研究所,武汉,430071 |
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| 基金项目： | 中国科技部社会公益研究专项(2004DIB3J131)，长江三峡工程开发总公司资助项目 |
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| 摘 要： | ??????2003??6????????????????????????????????????????????????????????????????м?Ъ???????????????????????????????????????????????渽??????????λ?????????2?????????Q????????????;ML??2.0???????????????????????????????????????????????????????????????????????????????????й???,??????????????????????????????????????????????;??????????????????????????????????????????????????????????ж????????????λ???????μ?????????????????????????????????????ú?????????????????????????
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| 关 键 词： | ???????????? ?????? ???????? ????? ?????? |
| 文章编号： | 1671-5942（2007）03-0097-09 |
| 修稿时间： | 2006-12-15 |
SEISMIC ACTIVITY CHARACTERISTICS IN DONGRANGKOU AREA, BADONG COUNTY OF HUBEI PROVINCE |
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| Chen Junhua,Gan Jiasi,Li Shengle,Di Lisha,Xue Junrong.SEISMIC ACTIVITY CHARACTERISTICS IN DONGRANGKOU AREA, BADONG COUNTY OF HUBEI PROVINCE[J].Journal of Geodesy and Geodynamics,2007,27(3):97-105. |
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| Authors: | Chen Junhua Gan Jiasi Li Shengle Di Lisha Xue Junrong |
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| Institution: | 1 University of Science and Technology of China, Hefei 230026;2Institute of Seismology, CEA, Wuhan 430071 |
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| Abstract: | The seismic activity characteristics in Dongrangkou area of Badong county of Hubei province have been analyzed since the Three Gorges reservoir impoundment in June,2003.It is shown that the micro earthquakes and the tiny micro earthquakes have a intermittent and waving frequency strength process. Most of the events occur near the shallow surface layer of sea level,very a few of them occur under the depositional cover layer and all of them display the characteristic of low
Q value. The focal mechanism solutions of ML≥2.0 earthquakes show the different rupture and slippage stress condition of part terrane,there isn’t proof to prove that the earthquake are connected with the southwestern segment of north east Gaoqiao fault in the northwest of this area.The events do not belong to a group controlled by a bigger seismogenic body and are not of a unify tectonic type.The main inducement of the dense seismic activity in the Dongrang river canyon is depositional cover layer’s stress adjustment strain release caused by the gravity unloads of reservoir bank slope and the adjusting tiny displacement of the mountain body under the osmosis of reservoir water.In addition, some of the events are the induced earthquake by mining in the east of canyon. |
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| Keywords: | Dongrangkou area of Badong county Three Gorges reservior focal mechanism solution stress field reservoir earthquake |
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