Earthquake · reviewed by a seismologist
M 2.8md
Earthquake near Redding, CA
No earthquake was likely felt in Redding in the 24 hours to 5:25 am PST (13:25 UTC). The last one was M 2.3, 5 km (3 mi) SW, at 4:06 pm PDT on 4 October 2026, estimated intensity II (weak) in town. Every earthquake near Redding
This page: a magnitude 2.8 earthquake was recorded 41 km (25 mi) southeast of Redding, CA, at 9:20 am PST on 11 February 2021 (17:20 UTC), 15 km deep.
USGS: 19km WSW of Manton, CA
66 km (41 mi) NNW of Chico, CA · 38 km (23 mi) SE of Redding, CA
- When
- 9:20 am PST on 11 February 2021 ()
- Where
- 41 km (25 mi) southeast of Redding, CA · earthquakes near Redding
- Magnitude
- M 2.8 (md)
- Depth
- 15 km below the surface
- Felt
- no reports yet
- Nearest
- Tehama County, 27 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2030 days ago
Earthquake alerts for Redding, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 23 km (14 mi) from the epicentre. In Redding, 41 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.
Likely felt in: Red Bluff 23 km, intensity II · Shingletown 23 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
- Magna, Utah 2020 M 5.7 22,000× the energy of this one
- Around the size people start to feel M 3.0 2× the energy of this one
- This earthquake M 2.8 about 480 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 · 45 km NW 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 40.3277, -122.0540. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tehama County, CA | 27 km (17 mi) | SW | earthquakes near Tehama County |
| Shasta County, CA | 48 km (30 mi) | N | earthquakes near Shasta County |
| Butte County, CA | 83 km (52 mi) | SSE | earthquakes near Butte County |
| Glenn County, CA | 86 km (53 mi) | SSW | earthquakes near Glenn County |
| Trinity County, CA | 97 km (60 mi) | WNW | earthquakes near Trinity County |
| Plumas County, CA | 111 km (69 mi) | ESE | earthquakes near Plumas County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 2.1 2km NW of Bella Vista, CA
- 1.5 12km ESE of Viola, CA
- 1.5 12km ESE of Viola, CA
- 1.5 6km NNE of Millville, CA
- 1.7 2km SW of Palo Cedro, CA
- 2.1 0km S of Palo Cedro, CA
- 1.6 4km W of Shasta Lake, CA
- 1.9 12km ESE of Viola, CA
- 1.5 1km NW of Palo Cedro, CA
- 1.6 3km WSW of Shasta Lake, CA
- 1.5 1km NW of Palo Cedro, CA
- 1.6 1km SW of Palo Cedro, CA
- 1.7 2km WSW of Palo Cedro, CA
- 1.6 2km W of Palo Cedro, CA
- 1.5 6km ESE of Bella Vista, 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.