Minor mag. 1.7 earthquake - 8km NW of The Geysers, CA, USA, on Tuesday, 23 Feb 2021 4:03 am (GMT -8) -
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Minor magnitude 1.7 earthquake at 2 km depth
23 Feb 12:06 UTC: First to report: USGS after 2 minutes.
23 Feb 22:22: Magnitude recalculated from 1.9 to 1.7. Hypocenter depth recalculated from 1.4 to 1.8 km (from 0.9 to 1.1 mi).
23 Feb 22:22: Magnitude recalculated from 1.9 to 1.7. Hypocenter depth recalculated from 1.4 to 1.8 km (from 0.9 to 1.1 mi).
I felt this quake
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Local time at epicenter: Tuesday, 23 Feb 2021 4:03 am (GMT -8)
Magnitude: 1.7
Depth: 1.8 km
Epicenter latitude / longitude: 38.83067°N / 122.81783°W
(California, United States)Nearest volcano: Clear Lake (16 km / 10 mi)
Nearby towns and cities:
8 km (5 mi) W of Cobb (pop: 1,780) --> See nearby quakes!
16 km (10 mi) S of Kelseyville (pop: 3,350) --> See nearby quakes!
18 km (11 mi) E of Cloverdale (Sonoma County) (pop: 8,810) --> See nearby quakes!
22 km (14 mi) SW of Clearlake (Lake County) (pop: 15,200) --> See nearby quakes!
25 km (15 mi) N of Healdsburg (Sonoma County) (pop: 11,700) --> See nearby quakes!
25 km (15 mi) N of Russian River (pop: 11,700) --> See nearby quakes!
25 km (15 mi) N of Russian River (pop: 11,700) --> See nearby quakes!
32 km (20 mi) N of Windsor (Sonoma County) (pop: 27,500) --> See nearby quakes!
44 km (28 mi) NNW of Santa Rosa (pop: 175,000) --> See nearby quakes!
117 km (73 mi) NW of Concord (pop: 128,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds
11.5°C (53 F), humidity: 66%, wind: 3 m/s (5 kts) from NNW
Primary data source: USGS (United States Geological Survey)Overcast Clouds
11.5°C (53 F), humidity: 66%, wind: 3 m/s (5 kts) from NNWEstimated released energy: 2.2 x 107 joules (6.22 kilowatt hours) More info
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Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!
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 |
| M 1.7 | 1.8 km | 8km NW of The Geysers, CA, USA | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
At magnitude 1.7, this quake was too small to be felt by humans, but it was recorded instrumentally.
