A series of major earthquakes struck in northern California late Thursday morning, prompting tsunami fears and shaking buildings as far south as Santa Cruz.
The first quake struck at about 10:45 a.m. off the coast of Petrolia, which is in Humboldt County about 100 miles south of the Oregon border. Its initial magnitude was measured at 6.6, according to the USGS, but has since been upgraded to magnitude 7.0. A second earthquake struck near Cobb, to the south, measured at magnitude 5.8. Several strong aftershocks were also recorded around both locations.
The California Geological Survey says the state’s shores have been struck by more than 150 tsunamis since 1800, and while most were minor, some have been destructive and deadly.On March 28, 1964, a tsunami triggered by a powerful earthquake in Alaska smashed into Crescent City hours later. Much of the business district was leveled and a dozen people were killed.
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