(The Sun) Seismologists have said a large magnitude earthquake on the offshore fault could trigger a 9.0 magnitude earthquake and an accompanying tsunami.

The recent cluster of earthquakes ranging from 2.8 to 5.6 magnitudes occurred six miles underwater, 126 miles from the west coast on the Juan de Fuca tectonic plate which is part of the Cascadia subduction zone, that runs from Northern California to British Columbia.