This is one of the larger earthquakes to strike the area over the past year… there was just one other M4.4 which struck two weeks ago.
This new M4.0+ movement over the past 2 weeks shows that the Pacific Northwest is under renewed stress, meaning we need to be on watch for adjacent nearby areas to possibly show larger movement over the next week.
This puts Vancouver BC (to the North), and California (to the South) in the mix over the next several days. We need to be on watch for similar (or larger) magnitude releases along the adjacent faults to this location in Washington State.
The Aleutian islands extend off the Southern coast of Alaska, reaching West across the Northern Pacific Ocean, bordering the arctic circle.
These islands are known for their past volcanic activity, with a few active volcanoes actually extending out Westward from Alaska towards Kamchatka Russia.
We could very well be observing a volcanic earthquake swarm which is the sign of a coming eruption. Worthy to note that Atka Volcano hasn’t erupted since 1995.
Any time we see large earthquake swarm activity at a volcanic location along this segment of the North Pacific, we need to watch out for NEW activity to strike the West coast of the United States, and also in the far West Pacific.
Volcanic seismicity in the North Pacific is a sign of greater plate unrest , thus we need to be on watch not only in Alaska at this swarm location (for an eruption OR large earthquake), but also we need to be on watch in adjacent areas several thousand miles away to the Southeast, and Southwest from this location in Alaska.
This North Pacific earthquake swarm now certainly has put the West coast United States, and East coast of Japan in the mix.