On January 9 , 2010 , the 6.5 Richter magnitude , 2010 Eureka earthquake 's epicenter was about offshore of Ferndale . Occurring within a subduction fault associated with the interaction of three tectonic plates ( Pacific , North American , and Juan de Fuca ) , it was the largest local earthquake since the 1992 Cape Mendocino earthquakes
2010 Eureka earthquake
2010 Eureka earthquake
Ferndale, California