"An earthquake with a revised magnitude of 4.3 struck northern Sonoma County Saturday morning, followed by two smaller aftershocks. The first quake was recorded at 9:22 a.m., about 15 miles north/northeast of Healdsburg, and about 3 miles southeast of the unincorporated Lake County area of Cobb, according to the U.S. Geological Survey. It was initially measured as having a magnitude of 4.1 after being reviewed by a seismologist at the USGS and was later revised upward."
"An aftershock with a preliminary magnitude of 2.9 hit about a mile south of there a minute later, at 9:23 a.m. Another quake with a preliminary magnitude of 2.6 was recorded at 12:17 p.m. in the same area. No impacts were reported to the nearest Northern Sonoma County Fire Protection District station in Geyserville after the largest quake, according to Keaton Mohar, a firefighter stationed there Saturday morning."
A magnitude 4.3 earthquake struck northern Sonoma County Saturday morning, with two smaller aftershocks following. The main quake occurred at 9:22 a.m., about 15 miles north-northeast of Healdsburg and about 3 miles southeast of the unincorporated Lake County community of Cobb. The U.S. Geological Survey initially measured the event at magnitude 4.1 before a seismologist reviewed the data and revised it upward to 4.3. A preliminary magnitude 2.9 aftershock occurred about a mile south at 9:23 a.m., and a preliminary 2.6 quake was recorded at 12:17 p.m. No impacts were reported to the nearest Northern Sonoma County Fire Protection District station in Geyserville.
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