Earthquake · reviewed by a seismologist
M 2.2md
Earthquake near Lower Lake, CA
No earthquake was likely felt in Lower Lake in the 24 hours to 6:41 am PST (14:41 UTC). The last one was M 2.6, 19 km (12 mi) SW, at 4:44 pm PST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Lower Lake
This page: a magnitude 2.2 earthquake was recorded 4 km (2 mi) west of Lower Lake, CA, at 9:22 pm PST on 6 February 2023 (05:22 UTC), 2.1 km deep. 3 people have reported feeling it to USGS.
USGS: 4km W of Lower Lake, CA
53 km (33 mi) N of Santa Rosa, CA · 128 km (80 mi) N of San Francisco, CA
- When
- 9:22 pm PST on 6 February 2023 ()
- Where
- 4 km (2 mi) west of Lower Lake, CA · earthquakes near Lower Lake
- Magnitude
- M 2.2 (md)
- Depth
- 2.1 km below the surface
- Felt
- 3 reports · strongest reported intensity III
- Nearest
- Lake County, 23 km NNW
- Nearest mapped fault
- Konocti Bay fault, 3 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1368 days ago
Earthquake alerts for Lower Lake, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 18 km (11 mi) from the epicentre. In Lower Lake, 4 km away, the estimate is intensity III (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Clearlake 5 km, intensity II · Cobb 12 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
- Magna, Utah 2020 M 5.7 200,000× the energy of this one
- Around the size people start to feel M 3.0 18× the energy of this one
- This earthquake M 2.2 about 52 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 5.1 on 2016-08-10 — about 25,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.2 6 km ESE of Talmage, California · 44 km WNW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 38.9167, -122.6513. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 23 km (14 mi) | NNW | earthquakes near Lake County |
| Colusa County, CA | 46 km (29 mi) | NE | earthquakes near Colusa County |
| Sonoma County, CA | 50 km (31 mi) | SSW | earthquakes near Sonoma County |
| Napa County, CA | 54 km (33 mi) | SSE | earthquakes near Napa County |
| Yolo County, CA | 70 km (44 mi) | ESE | earthquakes near Yolo County |
| Glenn County, CA | 79 km (49 mi) | NNE | earthquakes near Glenn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 1.9 6km WNW of Cobb, CA
- 1.7 7km W of Cobb, CA
- 2.4 3km ENE of The Geysers, CA
- 1.6 8km W of Cobb, CA
- 2.1 8km W of Cobb, CA
- 1.5 4km SW of Anderson Springs, CA
- 1.6 15km ENE of Nice, CA
- 1.6 8km NW of The Geysers, CA
- 1.5 5km NNW of The Geysers, CA
- 1.7 2km W of Anderson Springs, CA
- 2.4 1km ESE of The Geysers, CA
- 1.8 1km NE of The Geysers, CA
- 1.7 2km NW of The Geysers, CA
- 1.9 2km NW of The Geysers, CA
- 2.5 2km NW of The Geysers, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.