摘要
据中国数字地震台网测定,2004年1月20日16时34分11.9秒在滦县发生了ML=4.8的地震,震中位于东经118.77°,北纬39.71°,震源深度H=10km。尽管地震造成的破坏轻微,但有感范围较大,在秦皇岛市、青龙县、北京市、廊坊市、天津市等地均有震感。这次地震使震中及其附近地区的5台数字强震仪触发,记录了5组3分量数字加速度记录。本文对这次地震事件、地震地质概况作了简要介绍,并就台站(阵)基本背景资料、数字强震仪主要技术指标作了详细说明。最后,对获取的15条数字加速度记录作了初步处理分析,如基线校正、加速度峰值计算、傅里叶谱及反应谱计算等。
On January 20, 2004, at 16∶34∶11.9, there occurred a magnitude M _L=4.8 earthquake in Luan County, Hebei, which has been given a preliminary location by China digital seismic network of 39.71 northern latitude, 118.77 east longitude and a depth of 10 kilometers. The earthquake caused light damage in epicentral region and was felt as far away as Qinhuangdao city, Beijing city, Tianjin city,Langfang city, and Qinglong County. In the event, five digital strong motion accelerographs located at epicenter and nearby were triggered and recorded 15 accelerograms. In this paper, the event and the geographical setting of the seismic activity were briefly introduced, and a detailed description of the strong motion station (array) data and the specification of three digital strong motion accelerographs was given. Finally, the initial processing of 15 accelerograms, such as baseline correction and calculation of acceleration peaks, Fourier spectra and response spectra etc., were done.
出处
《地震工程与工程振动》
CSCD
北大核心
2004年第4期8-12,共5页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(50178065)
"九七三"项目课题(2002CB412706)
国家社会公益研究专项(2002DIB30076)
关键词
地震
震中
数字强震仪
加速度记录
earthquake
epicentre
digital strong motion accelerograph
accelerogram
