汶川地震在北京地区的形变同震响应

2008年5月12日四川汶川发生8.0级巨大地震。在这次大地震中,除压磁应力观测手段外,北京地区的钻空、倾斜、伸缩、断层、沙层、体应变等形变分值或秒值采样仪器记录到不同程度的同震响应。为了分析同震响应的表现形态及变化特征,系统搜集、整理和归纳了该地震引发的北京地区数字化同震响应信息。实际记录与分析结果表明,各类形变资料均出现不同幅度的形变震荡波,且不同仪器记震能力差别很大,验证了"九五"、"十五"和奥运保障新安装的数字化形变仪器的可靠性与灵敏性等问题。

Deformation coseismic responses in Beijing area for Wenchuan earthquake

On May 12, 2008, Wenchuan of Sichuan Province occurred Ms 8. 0 earthquake. During this earthquake all the deformation apparatus in Beijing recorded different degrees of coseis- mal responses. Therefore, we collected and coseismal responses recorded by deformation ap- partitus in Beijing of Wenchuan earthquake, analyzed the form and change characteristics of digital deformation observation minute data. The results show that each kind of deformation observation recorded different amplitude vibrate wave, and different device＇s record ability is distinct from each other. This result is also a verification for the reliability and sensitivity of the digital apparatus, which were equipped during ＂the ninth five-year plan＂, ＂the tenth fiveyear plan＂ and ＂the Olympic protection plan＂ period. These research are benefit to study the influence that caused by the Wenchuan earthquake to Beijing future seismic activity trend.