| 粤东、闽南沿海小震震源参数的研究 |
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| 引用本文： | 林纪曾,李幼铭. 粤东、闽南沿海小震震源参数的研究[J]. 地震学报, 1991, 13(4): 420-429 |
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| 作者姓名： | 林纪曾 李幼铭 |
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| 作者单位： | 1. 中国广州 510070 广东省地震局2. 中国北京 100101 中国科学院地球物理研究所 |
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| 摘 要： | 本文采用 P,S 振幅比资料测定小震震源参数的方法,研究粤东、闽南沿海地区的小震震源参数,文中针对该地区现有地震台站的设置偏布于地震一侧的实际情况,将台站相对于地震的分布归纳为三种不同的类型,分别进行人工数值试验,其目的在于探讨文献[1]方法对台站偏布于地震一侧时的资料处理能力及误差估计.在此基础上,就该地区1982年至1985年的39个(Ms=1.7——3.0)小震震源参数进行了实际资料处理.计算结果表明,该地区大多数震源错动面较陡,主压应力轴和主张应力轴大多近于水平,主压应力轴的优势取向为北西西方向
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| 关 键 词： | 震源参数 振幅比 综合地震图 东南沿海 |
DETERMINATION OF SOURCE PARAMETERS OF SMALL EARTHQUAKES IN THE EAST PART OF GUANGDONG AND SOUTH PART OF FUJIAN PROVINCE |
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| Affiliation: | 1. Seisrmilgical Bureau of Guangdong Province, Guangzhou 510070, China;2. Institute of Geophysics, Academia Sinicu, Beijing 100101, China |
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| Abstract: | Determination of source parameters of small earthquakes from amplitude ratios of P and S is studied in this paper when the distribution of the regional seismic network is skew to the earthquakes. The distribution of stations of the seismic network was to one side of the 17 earthquakes chosen from among 39 earthquakes in the east part of Guangdong and south part of Fujian province. The distribution of stations was classified into three types according to their relative positions with respect to the chosen earthquakes and the experiments of artificial data were done. Excellent results were also presented in various unfavouable conditions by using the method.As to the 39 small earthquakes recorded by the network in east Guangdong and south Fujian province from 1982 to 1986, the results can be summarized as follows: Most of the fault planes of the earthquakes apear to be steep. Most of the principal compression stresses P and tensile stresses T are nearly horizontal, concentrating in the WNW-ESE direction. |
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