During solar eclipse,the lunar shadow moves through the earth‘s atmosphere with supersonicspeed.Chimonas and Hines deemed that the shock waves produced by cooling of atmosphere wouldinduce gravity waves,and both TIDs and atmospheric pressure changes can be detected in theionosphere and on the ground respectively.Although the IGW signals from solar eclipse are usuallyquite weak,they can still be detected.The pressure changes on ground level occur near the regionof eclipse,but can be detected even far beyond the path of eclipse.This article is the first oneto report results of detecting pressure waves caused by solar eclipse in China.Druing the 23rd September 1987 annular solar eclipse,IGWs have been detected and recordedat infrasound observatories in (?)r(?)mqi,Taiyuan,Xuzhou and Suzhou,which are situated within thepath of annular eclipse,as well as in Beijing and Guiyang,which are situated on the opposite sidesof this path.The signals are detected by microbarometers of condenser microphone type.
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