Intraplate earthquake

Earthquake that occurs within the interior of a tectonic plate

An intraplate earthquake is an earthquake which occurs in the interior of a tectonic plate. They are relatively rare compared to the more familiar interplate earthquakes, which occur on the boundaries of tectonic plates. An earthquake that occurs within a subducting plate is known as an intraslab earthquake.

From Wikipedia, under CC BY-SA. More on occurri.