Deep Structure beneath Island Arcs

Electromagnetic View of the Seismogenic Zones Beneath Island Arcs

Isolated deep earthquakes beneath the North Island of New Zealand

Origin and evolution of the deep thermochemical structure beneath Eurasia

A unique structure in the Earth's lowermost mantle, the Perm Anomaly, was recently identified beneath Eurasia. It seismologically resembles the large low-shear velocity provinces (LLSVPs) under Africa and the Pacific, but is much smaller. This challenges the current understanding of the evolution of the plate-mantle system in which plumes rise from the edges of the two LLSVPs, spatially fixed i...

Three-dimensional Structure of the Crust and Mantle beneath the Island of Hawaii

The Island of Hawaii is the youngest and southeasternmost member of a quasi-linear, age-ordered, chain of volcanic islands and seamounts which extends for 3500 km across the northwestern Pacific sea floor. Similarities between the Hawaiian chain and at least six other linear island chains of the Pacific basin, including their nearly unidirectional and uniform rate of extension, WNW orientation,...

Tectospheric structure beneath southern Africa

P-wave and S-wave delay times from the broadband data of the southern Africa seismic experiment have been inverted to obtain three-dimensional images of velocity perturbations in the mantle beneath southern Africa. High velocity mantle roots appear to extend to depths of at least 250 km, and locally to depths of 300 km beneath the Kaapvaal and Zimbabwe cratons. Thick roots are confined to the A...