论文部分内容阅读
１９９３年７月１２日北京时间２１点２１分１９秒在北京中关村次声接收阵上及时地发现并完整地记录了日本北海道地震所产生的当地次声波（包括地震纵波、横波、表面波所辐射的声波）和震中次声波。其中当地次声波分别有：周期为１２ｓ，振幅为０．８Ｐａ，持续３．４ｍｉｎ；及周期为１２ｓ，振幅为０．４Ｐａ，持续１ｍｉｎ和周期为３０ｓ，振幅为１．３Ｐａ，持续１２ｍｉｎ；震中次声波周期为１３７ｓ，振幅为６．９Ｐａ，持续２８ｍｉｎ。它们叠加在周期为１２ｍｉｎ、幅度为１０Ｐａ的大气异常现象的波列上。
July 12, 1993 Beijing time 21:21:19 Zhongguancun infrasonic receiving array in Beijing in time to find and complete record of the Japanese Hokkaido earthquakes produced by the local infrasound (including seismic longitudinal waves, shear waves, surface waves of radiation Sonic) and epicenter infrasound. Among them, the local infrasound were: periodicity 12s, amplitude 0.8Pa, duration 3.4min; and period 12s, amplitude 0.4Pa, duration 1min and period 30s, amplitude 1.3Pa, for 12min; epicenter infrasound Period of 137s, amplitude of 6.9Pa, sustained 28min. They are superimposed on a train of atmospheric anomalies with a period of 12 min and an amplitude of 10 Pa.