【摘要】 2003年1月4日新疆伽师县发生了5.4级地震,其宏观烈度为 度。布设在伽师县城的强震固定台记录到5.4级主震及1次4.2级余震的加速度,其中一个地震的最大加速度值(水平分量)为66.12gal。初步分析这次强地震运动特性,得出两点结论:(1)强运动记录检验了投入使用的GDQJ-1A型仪器性能良好;(2)加速度时程记录表明垂直向P波初动尖锐、强震持时较长,最长约达7.5s,而水平向P波初动弱、强震持时较短,仅约2.5s。更多还原

【Abstract】 A M\-S5.4 earthquake occurred in Jiashi, Xinjiang, on Jan. 4, 2003. Intensity VI effects were noted at the epicenter. The digital strong motion seismograph that was set in the Jiashi county town recorded the accelerations of the mainshock and a magnitude 4.2 aftershock, and the maximum horizontal acceleration amounted to 66.12 gal. By analyzing the characteristics of the earthquake motion, the conclusions were drawn: (1) the performance of the GDQJ1A strong motion seismograph is fine; (2) the acceleration time histories shown that the vertical Pwave initial motions were sharp and the strong motion durations were long, the longest to 7.5 s, but the horizontal initial motions were weak and the strong motion durations were short, only 2.5 s.更多还原