Frequency Time Analysis (FTAN) and Moment Tensor Inversion Solutions from Short Period Surface Waves in Cameroon (Central Africa)
Frequency Time Analysis (FTAN) and Moment Tensor Inversion Solutions from Short Period Surface Waves in Cameroon (Central Africa)
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DOI：
10.4236/ojg.2014.42004
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
E. Ndikum;C. Tabod;A. P. Tokam
中科院分区：
文献类型：
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作者：
E. Ndikum;C. Tabod;A. P. Tokam
利用频域时间分析(FTAN)方法，对距离喀麦隆(中非)震中约186~778公里的一次地方地震记录的短周期面波进行了群速度图和频散波形的处理。提取的Rayleigh波和Love波的群速度基模被用来用矩张量联合反演幅度谱和P极性。得到了相应的群速度频散曲线、随深度变化的残差、从震中到不同台站直至约10公里深度的振幅谱和矩张量解。
Short period surface waves generated by a local earthquake recorded by broadband seismometers at distances of about 186 to 778 km from the earthquake’s epicenter located in Cameroon (Central Africa) were processed for group velocity maps and dispersion waveforms using the frequency time analysis (FTAN) method. The resulting group velocity fundamental modes of the extracted Rayleigh and Love waves were used for a joint amplitude spectral and P polarity inversion using moment tensor inversion. The corresponding group velocity dispersion curves, the residual as a function of depth, the amplitude spectra and the moment tensor solutions of the regions from the epicenter to the different stations up to a depth of about 10 km were obtained.