[olddustytrail]

I didn't realise Alaska had that southern archipelago but even before I checked it definitely looks like it traces a fault line.

[porkloin]

Yep, the 1964 earthquake that occurred in the area is to this day the most powerful earthquake recorded in North America and the second most powerful in the entire world. The region is insanely seismically active, even compared to the west coast of the continental US.

https://en.wikipedia.org/wiki/1964_Alaska_earthquake

[Electricniko]

Yep, it's along the ring of fire where most of the world's earthquakes occur.

https://en.wikipedia.org/wiki/Ring_of_Fire