Earthquake · reviewed by a seismologist
M 2.3md
Earthquake near Corning, CA
No earthquake was likely felt in Corning in the 24 hours to 1:24 pm PST (21:24 UTC). The last one was M 4.0, 81 km (51 mi) SW, at 5:01 am PDT on 28 October 2026, estimated intensity II (weak) in town; 14 felt reports to USGS. Every earthquake near Corning
This page: a magnitude 2.3 earthquake was recorded 49 km (30 mi) west of Corning, CA, at 1:44 am PDT on 23 March 2023 (08:44 UTC), 3.0 km deep.
USGS: 30km N of Alder Springs, CA
82 km (51 mi) WNW of Chico, CA
- When
- 1:44 am PDT on 23 March 2023 ()
- Where
- 49 km (30 mi) west of Corning, CA · earthquakes near Corning
- Magnitude
- M 2.3 (md)
- Depth
- 3.0 km below the surface
- Felt
- no reports yet
- Nearest
- Glenn County, 46 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1328 days ago
Earthquake alerts for Corning, 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 19 km (12 mi) from the epicentre. In Corning, 49 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.
How big was it?
This earthquake released about 77 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
- Magna, Utah 2020 M 5.7 140,000× the energy of this one
- Around the size people start to feel M 3.0 12× the energy of this one
- This earthquake M 2.3 about 77 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:
- 5.5 33 km NW of Rancho Tehama Reserve, California · 31 km N 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 39.9215, -122.7527. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Glenn County, CA | 46 km (29 mi) | SE | earthquakes near Glenn County |
| Tehama County, CA | 50 km (31 mi) | ENE | earthquakes near Tehama County |
| Mendocino County, CA | 80 km (50 mi) | SW | earthquakes near Mendocino County |
| Trinity County, CA | 86 km (54 mi) | NNW | earthquakes near Trinity County |
| Lake County, CA | 90 km (56 mi) | S | earthquakes near Lake County |
| Colusa County, CA | 94 km (58 mi) | SSE | earthquakes near Colusa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
41 earthquakes have been recorded within 50 km since this one.
- 1.6 16 km N of Covelo, CA
- 2.1 29 km NW of Rancho Tehama Reserve, CA
- 2.3 10 km W of Alder Springs, CA
- 2.0 15 km NW of Red Bluff, CA
- 2.0 37 km WNW of Rancho Tehama Reserve, CA
- 2.0 18 km ENE of Lake Pillsbury, CA
- 3.0 26 km WSW of Rancho Tehama Reserve, CA
- 2.5 41 km ENE of Covelo, CA
- 2.4 41 km NNE of Covelo, CA
- 1.8 10 km WNW of Alder Springs, CA
- 3.0 14 km NW of Alder Springs, CA
- 1.7 10 km N of Lake Pillsbury, CA
- 1.9 25 km WSW of Rancho Tehama Reserve, CA
- 1.6 16 km N of Covelo, CA
- 1.7 14 km N of Lake Pillsbury, 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.