| 磁暴短周期感应场和佘山地区地幔电导率 |
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| 引用本文： | 严大华.磁暴短周期感应场和佘山地区地幔电导率[J].地球物理学报,1980,23(4):396-402. |
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| 作者姓名： | 严大华 |
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| 作者单位： | 上海市地震局 |
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| 摘 要： | 本文用周期图技术分析了佘山台磁暴时的地磁记录,较好地获得了时间范围10分钟到120分钟内的隐蔽周期。由水平成层的多层一维地球的电导率模型出发,从中估计出跟上地幔内高导电层相应的隐蔽穿透周期,得出这个高导电层深度约为90公里,其厚度约为42公里,它跟上层电导率之比为17。
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| 关 键 词： | 地幔电导率 磁暴 感应场 短周期 磁阻抗 导电层 场源 山地 电导率模型 感应效应 |
| 收稿时间： | 1979-03-16 |
SHORT PERIODIC INDUCTION FIELD OF GEOMAGNETIC STORMS ON ZO-SE AND ELECTRICAL CONDUCTIVITY IN THE UPPER MANTLE BENEATH THIS REGION |
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| YAN DA-HUA.SHORT PERIODIC INDUCTION FIELD OF GEOMAGNETIC STORMS ON ZO-SE AND ELECTRICAL CONDUCTIVITY IN THE UPPER MANTLE BENEATH THIS REGION[J].Chinese Journal of Geophysics,1980,23(4):396-402. |
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| Authors: | YAN DA-HUA |
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| Institution: | Seismological Bureau, of Shanghai |
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| Abstract: | Geomagnetic storm-time variations observed at Zo-Se are analysed for the study of the inductive response of the upper mantle. Some hidden periods ranging from 10-120 min. are discovered after using the periodgraph technic. Among these, two dis-tinct penetrating periods are estimated in accordance with an one-dimension multistra-tifying model. It may be defined, from the first penetrating period, that the penetra-ting depth is about 90 km, with which the top of the high conductive stratification of the upper mantle is just in correspondence. It may be also estimated, from the second penetrating period, that, the thickness of high conductive stratification is 42 km, be-tween which and the upper one the conductivity ratio is about 17. |
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