摘要
根据现场调查材料,对1936年4月1日广西灵山6 3/4级地震震中区烈度进行评定并绘制了等震线图。图中烈度Ⅸ、Ⅷ度区呈“T”形,两长轴方向与区内NEE及NNW方向断裂吻合。据此认为该震的发震构造为NEE和NNW两组断裂,6 3/4级地震系两组断裂共轭破裂的结果。又据低烈值沿NEE方向衰减较慢,认为NEE组断裂同时起控震构造作用。
In this paper, me seismic intensity in the epicentral area of Lingsnan m=o /4 occuring in Guangxi Province on
Apr. 1, 1936 is evalusted and the isoseismal map is compiled on the basis of the data of field investigation. In this map, the zones with intensities IX and VIII are in the form of 'T' . And directions of two long axes are consistent with
ENW -and NNW -trending faults in the area. From these data it can be thought that the seismogenic structures for
this earthquake are the ENE- and NNW -trending faults. The M=6(3/4) earthquake is the result of conjugate rubture
of the two faults. The lower attenuation of the low seismic intensity in ENE direction led us to consider that the ENE - trending fault acted as an earthquake-controlling structure.
出处
《华南地震》
1992年第3期46-51,共6页
South China Journal of Seismology
关键词
烈度
等震线
发震构造
Lingshan M=6(3/4) earthquake
Seismic intensity
Isoseism
Seismogenic structure
