Lateral variation of Rayleigh wave dispersion character
Tóm tắt
The lateral variation of group velocity dispersion of Rayleigh waves has been investigated for Eurasia and its surroundings, and the area has been divided into several regions according to their dispersion characteristics. The continental shelf around Novaya Zemlya and the Baltic Sea were found to have the same dispersion character as high mountainous regions. The same is true for the Black and Caspian Seas. Soft sedimentary layers with great thickness could explain these unexpected results. Rayleigh waves run through the Tibet Plateau with extremely low velocities while they show the least continental character in East Siberia.