| Investigations of the seismomagnetic effect in the geomagnetic diurnal variations |
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| 引用本文： | 陈伯舫.Investigations of the seismomagnetic effect in the geomagnetic diurnal variations[J].地震学报(英文版),1994,7(3):457-464. |
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| 作者姓名： | 陈伯舫 |
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| 作者单位： | Department of Physics and Department of Geography and Geology，University of Hong Kong，Hong Kong |
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| 摘 要： | ＩｎｖｅｓｔｉｇａｔｉｏｎｓｏｆｔｈｅｓｅｉｓｍｏｍａｇｎｅｔｉｃｅｆｆｅｃｔｉｎｔｈｅｇｅｏｍａｇｎｅｔｉｃｄｉｕｒｎａｌｖａｒｉａｔｉｏｎｓＰｏ－ＦａｎｇＣＨＥＮ（陈伯舫）（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓａｎｄＤｅｐａｒｔｍｅｎｔｏｆＧｅ...
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| 收稿时间： | 18 February 1993 |
| 修稿时间： | 15 May 1993 |
Investigations of the seismomagnetic effect in the geomagnetic diurnal variations |
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| Po-Fang CHEN.Investigations of the seismomagnetic effect in the geomagnetic diurnal variations[J].Acta Seismologica Sinica(English Edition),1994,7(3):457-464. |
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| Authors: | Po-Fang CHEN |
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| Institution: | (1) Department of Physics and Department of Geography and Geology, University of Hong Kong, Hong Kong |
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| Abstract: | In this paper we attempt to Abstract seismomagnetic signals from geomagnetic diurnal variations of three components in quiet days before and after great earthquakes. The method employed here is to examine the ratio of apparent depths between two geomagnetic observatories using the single-station Z/H method. We first estimate the apparent depth for the period of 24 h for two observatories which are located at almost the same latitude. Then we analyse the time changes of the apparent-depth-ratio between these stations. In the interval of 1962 1988, the time variation of apparent-depth-ratio between the Beijing and Lanzhou observatories seems to be related to the three great earthquakes occurred near Beijing. Roughly speaking, the anomalous change in apparentdepth-ratio appears to be positive before earthquake, and appears to be negative after earthquake. |
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| Keywords: | geomagnetic S_q field single-station Z/H method deep conductivily seismomagnetic effect |
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