volume 25, issue 8, P1221-1224 1998
DOI: 10.1029/98gl00650
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Abstract: Abstract. To determine the location, strength, and orientation of seismic anisotropy in the Mariana subduction zone beneath Guam, we evaluated shear wave splitting in local S, regional S and ScS, and teleseismic core phases such as SKS recorded at station GUMO.Fast directions from the local S phases have an average azimuth of-45 ø , and splitting times range from 0.1 s to 0.4 s. For local S phases from events within the southeastern half of the subducting slab, splitting parameters manifest minimal frequency …

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