California’s Third Shakiest Earthquake?

Humboldt’s Queen of Quakes, Dr. Lori Dengler professor emeritus of geology at CalPoly Humboldt, joins Gang Green to break down the recent 6.4 magnitude rumbler. It wasn’t just you: that was a big one! It was the third most “shaky” recorded earthquake in California’s history (as measured by peak ground acceleration), with 1.46 g-force of acceleration.  Why was Rio Dell harder hit when the earthquake was centered closer to Ferndale? Why did this earthquake feel much more violent than other past earthquakes (which may have had higher magnitudes)? And what lessons can we learn from this earthquake to keep us safer in the future? PS: Check out Thomas Dunklin’s great virtual tour of the Mendocino Triple Junction.

USGS Map of December 20, 2022 earthquake in Ferndale, CA