Light mag. 3.5 earthquake - 14 mi north of Ukiah, Mendocino County, California, on Thursday, 27 August 2020 at 08:48 (GMT) -
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Light magnitude 3.5 earthquake at 8 km depth
27 Aug 08:51 UTC: First to report: USGS after 3 minutes.
Hypocenter depth recalculated from 0.4 to 8.3 km.
Hypocenter depth recalculated from 0.4 to 8.3 km.
Date & time: 27 Aug 2020 08:48:31 UTC -
Magnitude: 3.5
Depth: 8.3 km
Epicenter latitude / longitude: 39.35317°N / 123.24333°W

Nearest volcano: Clear Lake (60 km / 37 mi)
Nearby towns and cities:
10 km (6 mi) NNW of Redwood Valley (pop: 1,730) --> See nearby quakes!
12 km (7 mi) ESE of Willits (pop: 4,860) --> See nearby quakes!
23 km (14 mi) N of Ukiah (pop: 15,900) --> See nearby quakes!
43 km (26 mi) NW of Nice (pop: 2,730) --> See nearby quakes!
45 km (28 mi) NW of Tuckertown (pop: 4,810) --> See nearby quakes!
49 km (31 mi) E of Fort Bragg (Mendocino County) (pop: 7,290) --> See nearby quakes!
69 km (43 mi) NW of Clearlake (Lake County) (pop: 15,200) --> See nearby quakes!
97 km (60 mi) NNW of Windsor (Sonoma County) (pop: 27,500) --> See nearby quakes!
111 km (69 mi) NNW of Santa Rosa (pop: 175,000) --> See nearby quakes!
163 km (101 mi) NNW of Vallejo (pop: 121,300) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Magnitude | Depth | Location | Source |
3.5 | 8.3 km | 10km NNW of Redwood Valley, CA (USA) | USGS |
3.5 | km | Northern California (USA) | EMSC |
User reports for this quake (3)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Willits, CA (16.2 km WNW of epicenter) [Map] / Light shaking (MMI IV) : Was awake and in bed when the house gave a shake along with some creaking sounds and a low rumble. It was about the same intensity as the three quakes that we felt several weeks earlier.
Willits CA 95490 / Moderate shaking (MMI V) : woke me from my sleep
Willits CA 95490 / Moderate shaking (MMI V) : woke me from my sleep
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