1993年7月12日日本北海道地震次声波

英文篇名：Infrasound waves caused by earthquake on 12 July 1993 in Japan
中文刊名：声学学报
英文刊名：Acta Acustica
作者：谢金来 ; 谢照华
英文作者：XIE Jiulai (Institute of Acouatics ; Academic Sinica ; Beijing ; 100080)XIE Zhaohua(State Keg Lab. of Scicntific and Engineering Computing ; Institute of Computationdl Mathimatics and Scientific/Engineering Computing ; Chinese Academy of Sciences ; Beijing ; 10
出版日期：1996-01-10
机构：中国科学院声学研究所，中国科学院计算数学与科学工程计算研究所科学与工程计算国家重点实验室
年：1996
期：01
出版单位：声学学报

摘要

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。
Remarkable infrasound wave trains have been recorded at Beijing Infrasound Observatory at 21:21 BT (Beijing Time) on July 12, 1993. It is a complete set of local waves (including primary wave, shear wave and Rayleigh waves) and epicenter infrasound waves caused by an earthquake in Japan.There are periods of 12 s, 12 s, 30 s, and amplitudes of 0.8 Pa, 0.4 Pa, 1.3 Pa, and durations of 3.4 min, 1 min, 12 min respectively. The epicenter infrasound waves have period of 137 s, and its maximum amplitude of 6.9 Pa and durations 28 min. They were superimposed on a much longer and more usual series of waves with period about 12 min and amplitude 10 Pa; such waves, which are of natural origin,are characteristically received during meteorological inversions.

引文

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