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

Japan was struck by a new 6.9-magnitude earthquake on Friday morning, hitting a similar area of the Pacific coast to Monday night’s powerful 7.5-magnitude tremor. The new quake off Aomori prefecture triggered a fresh tsunami advisory from the Japan ...

An earthquake of magnitude 5.7 struck near Leh, Ladakh, at 11:51 am today. No immediate casualties or damage were reported.

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.

Japan has recorded a series of powerful aftershocks in the past several hours, including a magnitude 5.7 earthquake near the east coast of Honshu and a 4.9 earthquake in the Hokkaido region shortly after. Two smaller quakes, of magnitudes 3.2 and 3, were ...