Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Lewiston, CA
No earthquake was likely felt in Lewiston in the 24 hours to 11:03 pm PST (07:03 UTC). The last one was M 4.4, 93 km (58 mi) SW, at 3:21 pm PDT on 5 August 2026, estimated intensity II (weak) in town; 122 felt reports to USGS. Every earthquake near Lewiston
This page: a magnitude 1.9 earthquake was recorded 11 km (7 mi) north-northeast of Lewiston, CA, at 10:35 pm PDT on 14 August 2022 (05:35 UTC), 9.3 km deep.
USGS: 11km NNE of Lewiston, CA
42 km (26 mi) NW of Redding, CA · 141 km (87 mi) NW of Chico, CA
- When
- 10:35 pm PDT on 14 August 2022 ()
- Where
- 11 km (7 mi) north-northeast of Lewiston, CA · earthquakes near Lewiston
- Magnitude
- M 1.9 (md)
- Depth
- 9.3 km below the surface
- Felt
- no reports yet
- Nearest
- Trinity County, 34 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1550 days ago
Earthquake alerts for Lewiston, 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 11 km (7 mi) from the epicentre. In Lewiston, 11 km away, the estimate is intensity II (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.
Earthquakes near other towns within 30 km: Weaverville.
How big was it?
This earthquake released about 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
- Magna, Utah 2020 M 5.7 540,000× the energy of this one
- Around the size people start to feel M 3.0 48× the energy of this one
- This earthquake M 1.9 about 20 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.1 7km NW of Redding, CA · 35 km ESE 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 40.7988, -122.7632. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Trinity County, CA | 34 km (21 mi) | WSW | earthquakes near Trinity County |
| Shasta County, CA | 61 km (38 mi) | E | earthquakes near Shasta County |
| Tehama County, CA | 87 km (54 mi) | SSE | earthquakes near Tehama County |
| Siskiyou County, CA | 90 km (56 mi) | NNE | earthquakes near Siskiyou County |
| Humboldt County, CA | 98 km (61 mi) | W | earthquakes near Humboldt County |
| Del Norte County, CA | 147 km (91 mi) | NW | earthquakes near Del Norte County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.7 9 km NE of Shasta Lake, CA
- 1.8 20 km N of Bella Vista, CA
- 1.9 3 km S of Shasta Lake, CA
- 1.7 9 km NE of Shasta Lake, CA
- 1.6 3 km WSW of Bella Vista, CA
- 1.8 9 km NE of Shasta Lake, CA
- 2.1 14 km N of Hayfork, CA
- 1.7 24 km NNE of French Gulch, CA
- 1.8 26 km N of Shasta Lake, CA
- 1.9 4 km E of Redding, CA
- 1.8 26 km N of Shasta Lake, CA
- 1.7 9 km NE of Shasta Lake, CA
- 1.5 25 km N of French Gulch, CA
- 1.5 0 km WSW of Shasta Lake, CA
- 2.4 18 km WSW of Shasta, 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.