华南地震2012，Vol.32Issue(2)：112-120,9.
福建古田水口水库ML4.8级地震序列震源参数研究
A Study on Source Parameters of ML4.8 Earthquake Sequence at Shuikou Reservoir, Gutian, Fujian
摘要
Abstract
This Paper, based on the data regarding the A/L4.8 earthquake sequence to Gutian Shuikou Reservoir recorded by the regional digital seismic network of Fujian, and after taking out the propagation path effect, site response and instrument response from the seismic records, works out the source parameters for 38 earthquakes (ML>2.5) by adopting the inversion method of Atkinson, i.e. average over data recorded by several machines for a single earthquake. The calculation results show that favorable linear relation between the seismic moment and the magnitude is found, with the statistical relation of logMo=1.08A/L+9.63; a formula to estimate the moment magnitude Mw using the magnitude ML is established as Mw=0.72ML+0.387; it is hard to give a quantitative relation among other parameters in spite of the certain degree of relevance. An analysis on the variation of stress drop of the earthquake sequence with time considers that, during the pre-earthquake period, there is an accelerated accumulation of stress in ShuiKou Reservoir area, with abnormally high value of stress drop, which is found with a callback when it approaches the main shock and declines gradually after the largest aftershock without any abnormally high value.关键词
水库诱发地震/地震序列/震源参数/应力降/福建水口水库Key words
Reservoir -induced Earthquake/ Earthquake Sequence/ Source Parameter/ Stress drop/ Fujian Shuikou Reservoir分类
天文与地球科学引用本文复制引用
杨贵,李祖宁,陈祥熊,沈健健..福建古田水口水库ML4.8级地震序列震源参数研究[J].华南地震,2012,32(2):112-120,9.基金项目
中国地震局行业专项子项目“新地震参数测定及其在地震预测中的应用”福建局子项目,福建省地震局“新一代地震参数测定”项目联合资助. （）
