| The anomalous reactions of the geomagnetic horizontal field transfer functions before Tangshan earthquake |
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| 引用本文： | 龚绍京,陈化然,张翠芬,杨程君,马淑芹.The anomalous reactions of the geomagnetic horizontal field transfer functions before Tangshan earthquake[J].地震学报(英文版),1997,10(1):61-70. |
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| 作者姓名： | 龚绍京 陈化然 张翠芬 杨程君 马淑芹 |
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| 作者单位： | SHAO JING GONG (龚绍京) HUA RAN CHEN (陈化然) CUI FEN ZHANG (张翠芬) CHENG JUN YANG (杨程君) SHU QIN MA (马淑芹)Tianjin Seismological Bureau，Tianjin 300201，China |
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| 摘 要： | ＴｈｅａｎｏｍａｌｏｕｓｒｅａｃｔｉｏｎｓｏｆｔｈｅｇｅｏｍａｇｎｅｔｉｃｈｏｒｉｚｏｎｔａｌｆｉｅｌｄｔｒａｎｓｆｅｒｆｕｎｃｔｉｏｎｓｂｅｆｏｒｅＴａｎｇｓｈａｎｅａｒｔｈｑｕａｋｅＳＨＡＯＪＩＮＧＧＯＮＧ（龚绍京）ＨＵＡＲＡＮＣＨＥＮ（...
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| 收稿时间： | 12 July 1995 |
| 修稿时间： | 3 January 1996 |
The anomalous reactions of the geomagnetic horizontal field transfer functions before Tangshan earthquake |
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| SHAO,JING GONG.The anomalous reactions of the geomagnetic horizontal field transfer functions before Tangshan earthquake[J].Acta Seismologica Sinica(English Edition),1997,10(1):61-70. |
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| Authors: | SHAO JING GONG |
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| Institution: | (1) Tianjin Seismological Bureau, 300201 Tianjin, China |
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| Abstract: | We have collected the data of variometers in period from 1972 through 1984 at Changli and Baijiatuan stations. The results calculated from 19 groups of data show: 1) There are no significant anomalies of A, B at Baijiatuan and that of B at Changli, but there are evident anomalous changes for A u, A v at Changli station. This result basically agrees to the a, b calculated using the method of measuring magnetograms, which demonstrates that the anomalies limited in the aftershock area and its neighbouring regions. 2) There are some changes of the inter station transfer functions of C u, C v, F u, F v before Tangshan earthquake, and the changes of the image parts C v, F v are more obvious, which is in agreement with the research results for Hualian earthquake. However, according to the results of Carlisle M =5.0 earthquake by Beamish(1982), the real parts F u, C u change more significantly. |
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| Keywords: | horizontal field inter station transfer functions underground electric structure abnormal field normal field |
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