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Crustal structure of the north Pacific from Love-wave dispersion

DEPARTMENT OF GEOLOGY, UNIVERSITY OF MICHIGAN,, ANN ARBOR, MICHIGAN.

Abstract

Short-period Love wave dispersion from the Kurile Islands earthquake (June 22, 1952; O = 21^b 41^m 53^s; = 46° N; = 153°.5 E) can be explained with a two-layer crustal model in which the upper 2 km. of material has a shear-wave velocity of 2.31 km/sec. The second layer has a thickness of 4 km. and a shear-wave velocity of 3.71 to 3.86 km/sec. Shear-wave velocities of 4.50 to 4.52 km/sec. are used for the material immediately below the crust. This crustal model is compared with structures obtained from short-period Love wave dispersion across other Pacific paths and with results of refraction studies.

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