North Coast Experiences Series of Earthquakes, Experts Emphasize Preparedness

Last night, the North Coast region experienced a series of earthquakes ranging in magnitude from 2.9 to 4.4, according to data from the U.S. Geological Survey. To provide an overview of the seismic activity, Lauren Schmitt spoke with Lori Dengler, emeritus professor of geology at Cal Poly Humboldt in this interview:

Dengler confirmed that there were 10 earthquakes in the sequence, with three in the magnitude 4 range. The largest quake, a 4.4, occurred just before midnight. While the earthquakes were felt most strongly in the Eel River Valley and along the coast, including Petrolia, Dengler explained that they were relatively shallow, occurring between 4 and 8 miles beneath the surface. This meant the shaking was more localized and did not travel as far as deeper quakes. Importantly, Dengler stressed that these earthquakes were not aftershocks of previous seismic events in the region, but rather a separate sequence unrelated to the Cascadia Subduction Zone. She noted that the North Coast is the most seismically active area in the contiguous United States, and emphasized the need for ongoing earthquake preparedness.

To help community members prepare, Dengler recommended the “Living on Shaky Ground” magazine, available online and in print from the Redwood Coast Tsunami Work Group. She encouraged everyone to review their emergency supplies and plans, as the region faces risks not only from earthquakes but also potential winter storms. The recent seismic activity serves as a reminder that the North Coast remains prone to earthquakes, underscoring the importance of being ready when the ground starts to shake.