Regional Differences in the Phase Velocity and the Quality Factor Q of Mantle Rayleigh Waves

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Science  23 Jun 1978:
Vol. 200, Issue 4348, pp. 1379-1381
DOI: 10.1126/science.200.4348.1379


The phase velocity and the quality factor (Q) of mantle Rayleigh waves from the great Kurile Islands earthquake of 1963 have a close azimuthal correlation with each other and differ considerably among different paths. Serious error may be introduced in the interpretation of observed regionality in phase velocity if regional differences in Q are ignored.