One of the indian villages in Alaska is on the other side of a large bay from a fjiord(Glacier Bay maybe?). The story was that the ice king wanted a bride and came into the village that used to be on the fjiord. So the villagers had to flee to their current homee.
Scientists have now found the remnants of the old village that had been covered by ice a thousand years or so ago.
IIRC the large subduction earthquakes in the Pacific NW from 400+ years ago can be found in the native stories.
We should follow up on stories of this sort and find out the geology of the myth. We would learn a lot, I think.