摘要
本文采用“双差地震定位法”重新定位了福建数字地震台网正式运行以来发生的水口库区附近的地震,结果表明,记录的地震分二个时段,分别发生于不同的小区域内1999年1月~12底,发生于N26.35°~N26.40°,E118.67°~E118.70°,约5×3km2范围内,震源深度集中在9~10km范围内,整个震源的分布为一近水平的南北展布,具有一定的构造地震特征;2000年初至2005年末,地震主要发生于N26.39°~N26.41°,E118.62°~E118.64°,约2×2km2范围内,震源深度约2~4km,由于记录的地震震级小、个数少、时间跨度大,认为应是浅表应力局部调整的结果。
Using the double-different earthquake location algorithm, the paper relocated the earthquakes occurred in ShuiKou reservoir region since the FuJian digital seismic network. The results indicated that the earthquakes occurred in two different regions for two different periods: From Jan, 1999 to Dec,1999, the earthquakes occurred in 26.35°～N26.40°,E118.67°～E118.70°,focal depths is about 9 to 10km with some structure earthquake characteristics;Since 2000 to 2005 ,the earthquakes occurred in N26.39°～N26.41°,E118.62°～E118.64°,focal depths are about 2～4km,attributed to adjustment of shallow surface stress.
出处
《福建地震》
2006年第Z2期51-55,共5页
Fujian Seismology
关键词
水口水库
水库地震
双差定位
ShuiKou reservoir region
reservoir earthquake
double-different earthquake location algorithm
