| 用Sp震相测定北京地震台附近的地壳厚度 |
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| 引用本文： | 许健生.用Sp震相测定北京地震台附近的地壳厚度[J].地震地磁观测与研究,2009,30(5):91-95. |
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| 作者姓名： | 许健生 |
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| 作者单位： | 中国北京,100095,中国地震局地球物理研究所北京地震台;中国北京,100095,北京白家疃地球科学国家野外科学观测研究站 |
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| 摘 要： | 根据CDSN北京地震台宽频带数字地震仪记录到的20个远震记录中的S震相与Sp震相的到时差测定了北京地震台附近地壳厚度值H。得出了以北京地震台为圆心20～45km环形区域内地壳厚度平均值为40．2km左右的结果。并简要的讨论了Sp震相在北京地震台的记录特征。初步得出了Sp震相在北京地震台的可观测范围为11°～40°，S波震相高效率转换为Sp震相的距离约在30°的结果。
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| 关 键 词： | Sp震相 地壳厚度 北京地震台 |
The crustal thickness in vicinity of Beijing Seismic Station: determing with Sp phase |
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| Xu Jiansheng.The crustal thickness in vicinity of Beijing Seismic Station: determing with Sp phase[J].Seismological and Geomagnetic Observation and Research,2009,30(5):91-95. |
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| Authors: | Xu Jiansheng |
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| Institution: | Xu Jiansheng(1Beijing Seismic Station of Institute of Geophysics, China Earthquake Administration, Beijing 100095, China 2) Beijing Baijiantuan Earth Since State Geophysics observatory, Beijing 100095, China) |
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| Abstract: | In this paper,Sp phase have been observed from 20 broadband teleseismic waveform data at CDSN Beijing Seismic Station. The Sp and S phase arrive time difference data are used to determine the thickness of crust around the Beijing Seismic Station. A result is obtained that the average thickness of the crust H is 40. 2 km in the annular area with radii 20 -45 km around Beijing Seismic Station. The record characters of Sp phase are discussed simply. The results show that Sp phase may be observed between distance 11°-40°. The S wave trans-- form into Sp wave in highest efficiency at epicenter distance beyond 30°. |
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| Keywords: | Sp phase crustal thickness Beijing Seismic Station |
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