The Tidal Instruments Recorded Abnormal Tremor Wave
详细信息
- 责任者：Jiang Jun (School of Physics ; Huazhong University of Science and Technology ; Wuhan 430074 ; China) ; Zhang Yanbin
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(2)
- 关键词：固体潮 ; earth tide ; 地震前兆 ; precursor
- 页码：p.462-471
- 图表：5 illus., 26 refs.
- 分类号：0500
- 出版序号：20130071
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
This paper introduces the situation of HUST station,and covers the abnormal tremor waves recorded by DZW gravimeter and VS-1 tiltmeter. According to the research of the abnormal tremor waves and the tidal instruments, the authors found out that abnormal tremor wave is actually micro-tremor signals whose source is complex, and the signals have a wide response, and they can be recorded by broadband digital seismograph and tidal instruments. The main periods of the abnormal tremor waves aroused by the tropical cyclone in the Western Pacific are about 3~7 s, and the tremor waves before the earthquakes not only have a main period of 3~7 s but also have 10~60 s or longer cycle signals in it. The differences of the response to the abnormal tremor waves are mainly decided by the transfer function and the features of the instruments.