四川鲜水河断裂带上的一个地震活动空区
A SEISMIC GAP ON THE XIANSHUIHE FAULT, SICHUAN PROVINCE
-
摘要: 本文根据鲜水河断裂带自1900——1981年5级以上地震震中分布、6.5级以上地震的极震区或地震地裂缝带的展布,以及1967——1981年各次强震的余震分布,提出道孚——乾宁间出现缺震段.从弱震活动和地形变资料分析,认为这个缺震段不象是一个蠕动段.因此,可以认为这是一个地震活动空区,至少是一个第一类空区.根据统计关系推断,未来强震的最大震级可达7(1/2)级左右.Abstract: In this paper, based on the distribution of epicenters of earthquakes of magnitudes M 5 and the magistoseismic areas of earthquakes of M 6(1/2) occurred during the years from 1900 to 1981 as well as the distribution of the fracture zones of those earthquakes and the aftershocks of the major earthquakes occurred during the years from 1967 to 1981, it has been inferred that between Daofu and Gianning along the Xianshuihe Fault, a segment of seismic quiescence exists. In analysing the seismic activity of weak earthquakes of this area and the data of crustal deformation measurements, it does not seem to be a creeping portion of the fault. Therefore, it may be considered that this is a seismic gap, the first kind of Mogi, at least.According to statistical estimation, the maximum magnitude of the coming earthquake may be possibly 7(1/2).
-
-
[1] 国家地震局,中国地震烈度区划工作报告,地震出版社,1981,
[2] 茂木清夫(Mogi), Two kinds of Seismic gaps, Pure and Applied Geophysics, 117, 6, 1172——1186,1979.
[3] W. R. McCann et al., Seismic gaps and plate tectonics: Seismic potential for major boundaries, Pure and Applied Geophysics, 117, 6, 1082——1147, 1979.
[4] 《四川地震资料汇编》编辑组,四川地震资料汇编,1, 550——556,四川人民出版社,1980.
[5] Anold Heim, Earthquake region of Taobu, BGSA, 45, 1035——1050, 1934.
[6] 钱洪,鲜水河断裂带地震趋势的地质估计,地震研究,3, 4, 1980.
[7] 大竹政和,地震预报中第二种地震空区现象的意义,日本地震学会, 1979年度秋季讲演预稿集(B26), 1979.
[8] 刘本培等,鲜水河断裂的活动特征,地震科学研究,3, 30——37, 1981.[1] 国家地震局,中国地震烈度区划工作报告,地震出版社,1981,
[2] 茂木清夫(Mogi), Two kinds of Seismic gaps, Pure and Applied Geophysics, 117, 6, 1172——1186,1979.
[3] W. R. McCann et al., Seismic gaps and plate tectonics: Seismic potential for major boundaries, Pure and Applied Geophysics, 117, 6, 1082——1147, 1979.
[4] 《四川地震资料汇编》编辑组,四川地震资料汇编,1, 550——556,四川人民出版社,1980.
[5] Anold Heim, Earthquake region of Taobu, BGSA, 45, 1035——1050, 1934.
[6] 钱洪,鲜水河断裂带地震趋势的地质估计,地震研究,3, 4, 1980.
[7] 大竹政和,地震预报中第二种地震空区现象的意义,日本地震学会, 1979年度秋季讲演预稿集(B26), 1979.
[8] 刘本培等,鲜水河断裂的活动特征,地震科学研究,3, 30——37, 1981.
计量
- 文章访问数: 1113
- HTML全文浏览量: 27
- PDF下载量: 116
下载:
