摘要
本文利用、最大振幅比的方法,求出了华南六省200次小地震的震源机制解,发现该区现代构造应力场的主压应力轴的水平投影方向具有扇形分布特征,从该区的西部到东部,主压应力轴的水平投影方向为北南略偏东、北西和北西西方向;主张应力轴的水平投影方向具有弧形分布特征,沿着海岸线,从广西到福建,主张应力轴的方向为北西西、北东东和北北东方向,P轴和T轴的“平均”方向都基本水平。
The focal mechanism of 200 small earthquakes in South China were determined by means of P and S amplitude ratios. The result indicates that P-axes of the recent tectonic stress field are characterized by a fan-shaped distribution. From the west to the east of the region,the P-axes concentrate on NNE-NW-NWW. T-axes of the recent tectonic stress field are characterized by arcshaped distribution. From Guangxi to Fujian province along the coast, the T-axes concentrate on NWW-NEE-NNE. The mean P-axes and T-axes are nearly horizontal.
出处
《中国地震》
CSCD
北大核心
1992年第1期36-42,共7页
Earthquake Research in China
