A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating earthquake risk at the Cascadia subduction zone.

Large subduction-zone earthquakes leave scars on the continental slope in the deep sea.

(a) Geological units and earthquake distribution of an oceanic subduction zone. The orange shadow beneath the volcanic arc represents partially molten areas and magma channels. (b) Thermal structure ...

The Makran Subduction Zone is a significant but understudied source of tsunamigenic earthquakes impacting the northern Indian Ocean. Despite more than ...