| 赣中西地区地震波谱分析 |
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| 引用本文： | 曾文敬,项月文,罗丽,赵爱平.赣中西地区地震波谱分析[J].华南地震,2011,31(2):86-93. |
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| 作者姓名： | 曾文敬 项月文 罗丽 赵爱平 |
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| 作者单位： | 江西省地震局,江西,南昌,330039 |
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| 摘 要： | 选取赣中西地区23个ML≥2.0地震的单台波形数据,基于遗传算法,分别采用ω-3和ω-2震源谱模型对每个地震每个水平向的振幅谱进行搜索,得到2组低频水平Ω0和拐角频率fc.目测发现大多数地震震源谱符合ω-3模型,除1个地震的fc接近6 Hz外,其余22个地震的fc均小于3.51 Hz,明显偏低.这23个地震除fc接近6...
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| 关 键 词： | 赣中西部 地震 震源谱 |
Spectral Analysis of Earthquakes in the Central and Western Jiangxi |
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| ZENG Wenjing,XIANG Yuewen,LUO li,ZHAO Aiping.Spectral Analysis of Earthquakes in the Central and Western Jiangxi[J].South China Journal of Seismology,2011,31(2):86-93. |
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| Authors: | ZENG Wenjing XIANG Yuewen LUO li ZHAO Aiping |
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| Institution: | , XIE Caimei,LI Chuanjiang(Earthquake Administration of Jiangxi Province,Nanchang 330039,China) |
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| Abstract: | Based on the digital data of 23 earthquakes with ML≥2.0 in the central and western Jiangxi,we obtained 23 pairs of lower frequency level limit（Ω0）and corner frequencies（fc） by source spectrum models of ω-3 and ω-2,and the genetic algorithm.Comparing with the two source spectra of ω-3 and ω-2 for every earthquake,we find that most of these source spectra are consistant with the ω-3 attenuation model.Their values of fc are less than 3.51Hz.Correspondingly with obvious short-period surface wave.Only one earthquake shows no short-period surface wave with the value of fc of which is about 6 Hz.We believe that the lower corner frequencies are probably resulted from interferences of P wave and S wave radiated from shallow sources. |
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| Keywords: | The central and western of Jiangxi Earthquake Source spectrum |
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