After the mainshock, aftershocks commenced, including a magnitude 6.9 event.
These earthquakes result from subduction of the Pacific Plate beneath the westernmost part of the North American Plate (also known as the Okhotsk Plate). For more information, please visit the USGS event page. (3/end)
https://earthquake.usgs.gov/earthquakes/eventpage/us6000qw60/executive
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