| 海城地区地震波的衰减特征 |
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| 引用本文： | 李兴才,顾浩鼎.海城地区地震波的衰减特征[J].地震学报,1980,2(4):368-377. |
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| 作者姓名： | 李兴才 顾浩鼎 |
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| 作者单位： | 1. 国家地震局地球物理研究所
2. 辽宁省地震局 |
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| 摘 要： | 本文用文献1]的结果计算了可以用多台P初动振幅测定Q值的理论曲线, 并使用海城地震的部分余震的资料测定了海城地区地壳上层介质的Q值.通过与由 Pn 资料得到的上地幔顶部介质的 QM 值比较, 并对 Pn、P初动半周期进行统计表明, 海城地震区东南部上地幔顶部介质的衰减特征与其他地区的不大相同, 与地壳上部介质的衰减特征也不一样, 说明那里深部物质的熔化程度可能比其他地方的物质的熔化程度高.
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ON THE ATTENUATION OF SEISMIC WAVES THROUGH THE HAICHENG EARTHQUAKE AREA |
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| Affiliation: | 1. Institute of Geophysics, State Seismological Bureau;
2. Seismological Bureau of Liaoning Province |
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| Abstract: | From the results of 1] a set of theoretical curves used to determine the Q-value by means of the amplitudes of first P arrivals recorded at many stations are obtained in this paper. A portion of the aftershock data of the Haicheng earthquake of 1975 has been employed to determine the Q-value of the upper crust of the Haicheng region. Comparison with the QM-value of the top part of the upper mantle in this area obtained by the first Pn amplitudes data recorded at stations on the Liaodong Peninsula from some aftershocks of the 1976 Tangshan Earthquake sequence as well as some statistical results for the first half period of P and Pn suggest that there exist a difference in attenuation of the top part of the upper mantle between the southeastern portion of the Haicheng Earthquake region and other regions. This may imply that the deep materials there are melted in higher degree than in other parts of the area. |
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