UPDATE, 11:30 a.m.: Jabby 4.0 aftershock a few moments ago, felt here in Ferndale.
###
An earthquake, initially described as a 4.5 magnitude, shook Humboldt at 4:53 local time this morning. Shaking was felt over the course of several seconds in Fortuna, Humboldt’s cultural hub, and elsewhere in Northern California.
A 3.2m aftershock was felt a few minutes later.