This one makes me very nervous as that is on the north end of the Cascade subduction zone that has its beginnings off shore about 50 miles SW of Humboldt Bay and was the cause of a 9.1 tremor in 1799 and no... I was not witness to that regardless what others are saying about me...
LOL. The first thing I think of when I see “swarm” is killer bees.
Sure glad the earth doesn’t move down here.