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我国《诗经》最早描述了周幽王二年(公元前780年)陕西西周地震临震前发生的地光、地声及地面破坏情况:“烨烨震电,不宁不令,百川沸腾,山(山冢)崪崩,高岸为谷,深谷为陵.”近20多年来,我国相继发生的多次强烈地震前,地震区的不同地方都可听到不同音色的地声,唐山大地震也不例外.据调查,唐山大地震前远离震中300公里的地方都有人听到地声.距大地震震中100公里范国内,临震前尚未入睡的居民中,有95%听到了震前地声.在时间分布上绝大多数出现在临震前数小时至数分钟,也有少数出现在震前两天内.在大震前数小时听到的地声比较低沉,无明显的方向性.有的似大型履带式拖拉机接连不
The earliest descriptions of the “Book of Songs” in China from the “Book of Songs” described the earth light, ground sound and ground damage occurred two years ago (780 BC) before the earthquake in the Western Zhou Dynasty in Shaanxi Province: “Ye Ye Zhendian, restless, rivers boiling, mountains (Mountain mound) collapse, high shore for the valley, the valley for the tomb. ”In the past 20 years, China has occurred several times before the strong earthquake, the earthquake area can hear different voices of different places, Tangshan earthquake also Is no exception.According to the survey, before the Tangshan earthquake 300 km far from the epicenter of the hearing was heard.It is 100 km away from the epicenter of the earthquake in China, 95% of the residents who did not fall asleep before the earthquake had heard the sound before the earthquake . Most of the time distribution appeared in a few hours to minutes before the quake, and a few appeared in the two days before the quake. The sound of the ground heard for a few hours before the earthquake was relatively low with no obvious directionality. Like a large crawler tractor not connected