Accession Number : AD0443141


Title :   SPHEROIDAL FREE PERIODS OF THE EARTH OBSERVED AT EIGHT STATIONS AROUND THE WORLD,


Corporate Author : LAMONT GEOLOGICAL OBSERVATORY PALISADES NY


Personal Author(s) : Alsop, L E


Report Date : 18 Nov 1963


Pagination or Media Count : 22


Abstract : Spectral peaks corresponding to the spheroidal free periods of oscillation of the earth exist in the spectra of eight seismograms written at stations in different parts of the world shortly after the great Chilean earthquake of 22 May 1960. Th se data have been combined with those previously reported by various authors to obtain a very precise phase velocity vs period curve for Rayleigh waves in the period range of 200 to 3200 seconds. (Author)


Descriptors :   *SEISMOGRAPHS , FOURIER ANALYSIS , SEISMIC WAVES , EARTHQUAKES , CHILE , VELOCITY , SEISMOLOGICAL STATIONS , SEISMOLOGY , OSCILLATION , POLYNOMIALS , EARTH(PLANET)


Distribution Statement : APPROVED FOR PUBLIC RELEASE