Northern California’s Cascadia Subduction Zone Hit by 11 Earthquakes Over Weekend

Over the weekend, nearly a dozen earthquakes struck within a relatively small region just off the coast of Northern California, according to the United States Geological Survey (USGS).The 11 quakes ranged in magnitude between 2.9 and 4.5 on the Richter scale. Tremors from 3.0 up to 3.9 are considered “minor”—although they can often be felt—whereas quakes that measure between 4.0 and 4.9 are classified as “light” on the scale.The first of the quakes occurred beneath the ocean, around 11 miles west of Petrolia, a small community of about 500 people located in Humboldt County. It struck at 4:30 p.m. PT on Friday with a magnitude of 2.9, at a depth of 4.5 miles.

Source: Northern California’s Cascadia Subduction Zone Hit by 11 Earthquakes Over Weekend

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