【摘要】 本文采用喜马拉雅科学探测台阵四川省境内10个台站,计算了所有地震信号0.5—15Hz的H/V谱比,分析了震级、震源距对H/V谱比的影响,并与各台站场地地脉动H/V谱比进行了比较.结果表明:震级对各台站地震信号的H/V谱比振幅值以及峰值频率几乎没有影响;震源距对谱峰明显的H/V谱比曲线的谱形和峰值频率影响不大,但对谱峰不明显的H/V谱比曲线的峰值频率有一定影响;H/V谱峰明显的台站,地震信号与地脉动信号的H/V谱比曲线的峰值频率具有很高的一致性,H/V谱峰不明显的台站,二者的峰值频率有一定差异.更多还原

【Abstract】 This paper computes H/Vspectral ratio between 0.5Hz and 15 Hz of seismic records from the ten stations of the Himalayan array located in Sichuan Province,and the influence of magnitude and hypocentral distance on the H/V spectral ratio is analyzed.Finally the H/Vspectral ratios of seismic signals are compared with those of microtremor.The results indicate that the magnitude almost has no influence on amplitude and peak frequency of H/V spectral ratio of seismic signal.On the other hand,hypocentral distance has no influence on amplitude shape and peak frequency of H/V spectral ratio of seismic signal when the spectra peak is obvious,whereas when the spectra peak is not obvious,it may have some influence on the peak frequency.For the stations with obvious spectra peak,peak frequency of H/V spectral ratio of seismic signal is coincident with that of microtremor,while different from each other for the stations without obvious spectra peak.更多还原