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本文利用在西藏地区专设的长周期地震台网所记录的圣萨尔瓦多地震,计算了穿过大陆型与海洋型岩石圈介质的地震面波群速度(30～300秒周期),并指出了它们之间的差异。讨论了反演所得地壳与上地幔的横波速度分布特征。结果表明:这种差异一直延续到地幔深处330公里的介质中。
In this paper, we use the San Sebastian Earthquake recorded by a special long-period seismic network in Tibet to calculate the seismic surface wave group velocities (30 ~ 300 sec period) across the continental and oceanic lithospheric media and point out that they difference between. The characteristics of the shear velocity distribution in the retrieved crust and upper mantle are discussed. The results show that this difference has been extended to 330 km deep mantle media.