The 9 April 1985 earthquake occurred in the same fault area as the 2010 Pichilemu earthquake, and is considered by University of Chile Seismological Service a thrust fault-type interplate earthquake.
22.
:: " Near the Nazca subduction zone, the recorded history of interplate earthquakes ( of varying size ) spans 80 years "-do we need the parentheses here?
23.
North of the Mendocino Triple Junction, the Gorda plate is interplate events there has generated contention regarding the zone's seismic hazard, though there are strong indications that substantial historic events have occurred in the Pacific Northwest.
24.
This was an interplate earthquake, with a low-angle 1968 Offshore Tokachi earthquake on May 16, 1968, implying that the 1994 Offshore Sanriku earthquake completed the incompleted fault slip in the source region of the 1968 Offshore Tokachi earthquake.
25.
However, the greatest earthquake in Canadian history recorded by seismometers was the 1949 Queen Charlotte earthquake, an interplate earthquake that occurred on the ocean bottom just off the rugged coast of Graham Island, which reached magnitude 8.1 on the moment magnitude scale.
26.
Other strong earthquakes have affected the same area, with some that were clearly associated with the ( interplate ) Mendocino Fracture Zone, and others ( like the two shocks on April 26 ) were intraplate earthquakes that ruptured within the Gorda Plate, but events that are unequivocally associated with the Cascadia subduction zone are very infrequent.
