Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Redding, CA
No earthquake was likely felt in Redding in the 24 hours to 1:44 am PST (09:44 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 1.9 earthquake was recorded 48 km (30 mi) east-northeast of Redding, CA, at 7:26 am PDT on 10 September 2023 (14:26 UTC), 9.2 km deep. 1 person has reported feeling it to USGS.
USGS: 5 km E of Round Mountain, CA
47 km (29 mi) ENE of Redding, CA · 115 km (72 mi) N of Chico, CA
- When
- 7:26 am PDT on 10 September 2023 ()
- Where
- 48 km (30 mi) east-northeast of Redding, CA · earthquakes near Redding
- Magnitude
- M 1.9 (md)
- Depth
- 9.2 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- Shasta County, 14 km WSW
- Nearest mapped fault
- Rocky Ledge fault, 23 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 1158 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 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 12 km (7 mi) from the epicentre. In Redding, 48 km away, the estimate is intensity I (not felt). 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: Burney.
How big was it?
This earthquake released about 23 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 5.8 660,000× the energy of this one
- Magna, Utah 2020 M 5.7 470,000× the energy of this one
- Around the size people start to feel M 3.0 42× the energy of this one
- This earthquake M 1.9 about 23 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 5.0 on 2023-09-08 — about 40,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.1 7km NW of Redding, CA · 48 km WSW 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 40.7925, -121.8873. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Shasta County, CA | 14 km (8 mi) | WSW | earthquakes near Shasta County |
| Tehama County, CA | 80 km (49 mi) | SSW | earthquakes near Tehama County |
| Siskiyou County, CA | 104 km (64 mi) | NNW | earthquakes near Siskiyou County |
| Trinity County, CA | 105 km (65 mi) | W | earthquakes near Trinity County |
| Lassen County, CA | 107 km (66 mi) | E | earthquakes near Lassen County |
| Plumas County, CA | 127 km (79 mi) | SE | earthquakes near Plumas County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.7 16 km NNE of Shingletown, CA
- 1.8 4 km WNW of Shasta Lake, CA
- 1.8 10 km WSW of Manton, CA
- 2.3 14 km N of Shingletown, CA
- 2.2 11 km WSW of Fall River Mills, CA
- 2.4 11 km WNW of Burney, CA
- 1.7 2 km WNW of Shasta Lake, CA
- 2.9 2 km NW of Shasta Lake, CA
- 2.2 15 km N of Viola, CA
- 1.9 11 km NNE of Shasta Lake, CA
- 2.0 10 km WSW of Fall River Mills, CA
- 1.9 14 km W of Shingletown, CA
- 2.3 16 km N of Viola, CA
- 1.9 15 km N of Viola, CA
- 2.6 15 km N of Viola, 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.