Space-time ray method of calculating waves in a weakly inhomogeneous,layered medium

A space-time ray method is presented for constructing the fields of Love and Rayleigh waves for a half space with parameters that vary slowly in a horizontal direction, while the free surface and boundaries of the layers are weakly curved. A surface wave is interpreted here as a harmonic wave packet with amplitude and frequency modulation.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 99, pp. 5–18, 1980.