The quake was first called a 6.6, but the USGS later bumped it up to a 7.0. Not long after, a big aftershock hit near Cobb, California, in Lake County, clocking in at 5.8, according to the USGS. A bunch of smaller aftershocks followed right after the 7.0, ranging from 2.5 to 4.2 on the scale.
A Brief History of Earthquakes in and Near Eureka, California
Eureka, California, sits near the Mendocino Triple Junction, a tectonically active area where the Pacific, North American, and Gorda plates converge. Over the past 50 years, the region has experienced several significant earthquakes, highlighting its seismic vulnerability.
1. 1980 Eureka Earthquake
Date: November 8, 1980
Magnitude: 7.2
Details: This offshore earthquake, centered about 60 kilometers west of Patrick's Point, caused severe shaking in Eureka, resulting in broken windows, collapsed chimneys, andβ¦
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