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Magnitude-frequency relation and deep-focus earthquakes

GEOPHYSICAL AND POLAR RESEARCH CENTER DEPARTMENT OF GEOLOGY AND GEOPHYSICS, 6118 UNIVERSITY AVENUE, MIDDLETON, WISCONSIN 53562

Abstract

Investigation of the magnitude-frequency realtion for earthquakes in island arcs has revealed lower values of the slope for deep earthquakes in New Hebrides, Solomon Islands and Japan as compared to the values of the slope for shallow and intermediate earthquakes. A very low value of the slope is revealed for the deep Andean earthquakes. The slope is the same for Tonga-Fiji for all depth ranges.

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