| 日本Mw9.0强震的高频GPS形变波特征初探 |
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| 引用本文： | 彭懋磊,刘刚,聂兆生,杜瑞林,赵斌.日本Mw9.0强震的高频GPS形变波特征初探[J].大地测量与地球动力学,2011,31(6):6-10. |
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| 作者姓名： | 彭懋磊 刘刚 聂兆生 杜瑞林 赵斌 |
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| 作者单位： | 中国地震局地震研究所,武汉,430071 |
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| 基金项目： | 地震公益性行业科研专项，三峡库区形变场与水库加卸载关系研究 |
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| 摘 要： | 利用高频GPS数据长基线双差精密定位技术,获取2011年3月日本Mw9.0强震近场和远场GPS连续参考站的瞬时动态形变.分析表明:距震源较近的IGS站(USUD)的同震动态形变水平方向幅度超过60 cm,震后水平形变达到30 cm；位于远场的GPS连续参考站(JLYJ)的动态形变,清晰地给出了地震面波引起的地表形变波形...
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| 关 键 词： | 高频GPS 日本Mw9.0强震 GPS形变波形 地震面波 Rayleigh波 |
PRELIMINARY STUDY ON CHARACTERISTICS OF HIGH-FREQUENCY GPS DISPLACEMENT WAVE OF JAPAN Mw9.0 EARTHQUAKE |
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| Peng Maolei,Liu Gang,Nie Zhaosheng,Du Ruilin,Zhao Bin.PRELIMINARY STUDY ON CHARACTERISTICS OF HIGH-FREQUENCY GPS DISPLACEMENT WAVE OF JAPAN Mw9.0 EARTHQUAKE[J].Journal of Geodesy and Geodynamics,2011,31(6):6-10. |
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| Authors: | Peng Maolei Liu Gang Nie Zhaosheng Du Ruilin Zhao Bin |
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| Institution: | (Institute of Seismology,Wuhan 430071) |
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| Abstract: | By using high frequency GPS double difference precision positioning technology, kinematic and static co seismic deformations caused by Japan Mw9.0 earthquake at near field and far field GPS stations were obtained. The result shows that the maximum kinematic amplitude of IGS station is over 60 cm,post earthquake deformation reached to 30 cm. The kinematic deformation of far field JLYJ GPS station clearly reflects the displacement waveform caused by seismic surface waves. The spectrum analysis shows that the period of seismic surface waves of JLYJ station caused by kinematic deformation is about 10-17 seconds. The kinematic displacements in east west direction and the vertical direction are much larger than that in the north south direction,it shows the deformation of JLYJ station is mainly caused by the Rayleigh wave and its harmonic wave. On the basis of the epicentral distance, the earthquake occurrence time, we can set the Rayleigh wave propagation speed of 3.5 km/s. As the Rayleigh wave changes in a period of 10-17 seconds, so its wavelength of is about 50 km. |
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| Keywords: | high-frequency GPS Japan Mw9 0 earthquake GPS deformation waveform seismic surface wave Rayleigh wave |
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