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Letter

Nature Geoscience 1, 771–776 (1 November 2008) | doi:10.1038/ngeo318

A slab fragment wedged under Tokyo and its tectonic and seismic|[nbsp]|implications

Shinji Toda , Ross S. Stein , Stephen H. Kirby & Serkan B. Bozkurt

The Philippine Sea and Pacific plate slabs both subduct beneath Tokyo, and so their configuration and seismic potential have been subject to intensive study. Previous work suggests that the Philippine Sea slab extends up to 100|[thinsp]|km northwest of Tokyo and subducts to a depth of 90|[thinsp]|km beneath the Kanto basin, where it is folded against the underlying Pacific slab.