Showing papers by "Ajit Mal published in 1962"

On the frequency equation for love waves due to abrupt thickening of the crustal layer

Abstract: The effect of thickening of the crustal layer in mountainous region on the dispersion curve of Love waves has been studied Perturbation method has been applied to obtain the modified frequency equation for Love waves through the surface of separation between a semi-infinite material and a layer the thickness of which abruptly increases throughout a certain length of the path The effect is to decrease the phase velocity of the waves particularly in the low period range It has been pointed out that by proper study, the amount of thickening may be obtained

Dispersion of love waves in a spherical earth with corrugated surface

Abstract: Propagation of Love waves over the spherical surface of a layered earth model has been discussed with special emphasis on the dispersion produced in the layer The velocity of the waves with large wave-length increases appreciably as compared to the case of plane layer The analysis has been extended to deduce an expression for the dispersion equation of the waves when the upper layer is of varying thickness The modifications imparted to the dispersion equation depends on the amplitude only and not the shape of the corrugations provided we neglect small quantities of the second order The effect is a substantial decrease in the phase velocity and becomes more pronounced if the amplitude of the corrugations increases