大地测量与地球动力学2011，Vol.31Issue(6)：6-10,5.
日本Mw9.0强震的高频GPS形变波特征初探
PRELIMINARY STUDY ON CHARACTERISTICS OF HIGH-FREQUENCY GPS DISPLACEMENT WAVE OF JAPAN Mw9.0 EARTHQUAKE
摘要
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 epicen-tral 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.关键词
高频GPS/日本Mw9.0强震/GPS形变波形/地震面波/Rayleigh波Key words
high-frequency GPS/ Japan Mw9. 0 earthquake/ GPS deformation waveform/ seismic surface wave/ Rayleigh wave分类
天文与地球科学引用本文复制引用
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):6-10,5.基金项目
地震公益性行业科研专项(200808080) （200808080）
三峡库区形变场与水库加卸载关系研究(2008BAC38B03) （2008BAC38B03）
