| 1990年10月20景泰地震的活动图象及其特征 |
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| 引用本文： | 阎志德,王周元.1990年10月20景泰地震的活动图象及其特征[J].西北地震学报,1992,14(2):42-48,58. |
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| 作者姓名： | 阎志德 王周元 |
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| 作者单位： | 国家地震局兰州地震研究所
(阎志德)，国家地震局兰州地震研究所(王周元) |
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| 摘 要： | 本文研究了甘肃景泰6.2级地震的活动图象及其特征。该次地震的类型属主震余震型。其地震活动的特征表现为:强震前中小地震活动图象发生变化,临震前出现中小地震活动条带;震前中小地震活动时间分维值下降并出现最低值;该次地震发生于6级地震等间距分布的格局中,并呈现明显的补位特征。本文还提出了一种利用震级测定值最大的台站的方位,确定地震破裂面的方向和节面展布的方向的方法。
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| 关 键 词： | 地震 活动 图象 特征 甘肃 |
| 收稿时间： | 1991/8/6 0:00:00 |
SEISMIC PATTERN AND CHARACTERISTICS OF THE JINGTAI EARTHQUAKE OF OCT. 20, 1990 |
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| Yan Zhide and Wang Zhouyuan.SEISMIC PATTERN AND CHARACTERISTICS OF THE JINGTAI EARTHQUAKE OF OCT. 20, 1990[J].Northwestern Seismological Journal,1992,14(2):42-48,58. |
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| Authors: | Yan Zhide and Wang Zhouyuan |
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| Institution: | Earthquake. Research Institute of Lanzhou, SSB, China and Earthquake. Research Institute of Lanzhou, SSB, China |
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| Abstract: | On Oct. 20. 1990, there occurred a earthquake with magnitude of 6.2 in Jingtai area, Gansu. which is main-aftershock type. The seismic active feature shows:before strong earthquake, the distribution pattern of moderate and small events changed, the seismic belt appeared impending main shock:the time fractal dimension value decreased and got the minimum, the position style of equo-distance distribution of earthquakes with magnitude of 6 occurred nearby was characterized by filling location obviously. Also. this paper suggested a new method to rapidly obtain the trend of seismic rupture and nodal face from the position of stations, relative to epicentre, with the maximum values of magnitude determined. |
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