Using fast Hartley transform to study the free oscillations of the earth
Source: Journal of Seismology, Volume 2, Number 2, June 1998 , pp. 179-181(3)
Abstract:In recent years, Hartley Transform (HT) as a substitute of much widely used Fourier Transform (FT) has been practised in science and industries. The advantage of faster computation of HT is enormous when one is dealing with very long data sets. One such application arises in computation of parameters of Free Oscillations of the Earth (FOE), where one needs to study very long period vibrations of the earth, excited after a large earthquake. We demonstrate here an application of HT to determine the parameters of these normal modes of the earth after the Minahasa Peninsula earthquake of 18 April 1990 (M_s = 7.5).
Document Type: Miscellaneous
Publication date: June 1998