Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Red Bluff, CA
No earthquake was likely felt in Red Bluff in the 24 hours to 12:46 pm PST (20:46 UTC). The last one was M 4.0, 97 km (60 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 Red Bluff
This page: a magnitude 1.7 earthquake was recorded 48 km (30 mi) east-northeast of Red Bluff, CA, at 9:20 pm PST on 4 February 2025 (05:20 UTC), 12 km deep.
USGS: 12 km W of Mineral, CA
63 km (39 mi) N of Chico, CA
- When
- 9:20 pm PST on 4 February 2025 ()
- Where
- 48 km (30 mi) east-northeast of Red Bluff, CA · earthquakes near Red Bluff
- Magnitude
- M 1.7 (md)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Tehama County, 50 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 645 days ago
Earthquake alerts for Red Bluff, 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 4 km (2 mi) from the epicentre. In Red Bluff, 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: Shingletown.
How big was it?
This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 870,000× the energy of this one
- Around the size people start to feel M 3.0 78× the energy of this one
- This earthquake M 1.7 about 12 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 4.4 on 2024-04-05 — about 10,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.5 15 km NE of Mineral, California · 25 km NE 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 40.3177, -121.7040. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tehama County, CA | 50 km (31 mi) | WSW | earthquakes near Tehama County |
| Shasta County, CA | 57 km (35 mi) | NNW | earthquakes near Shasta County |
| Butte County, CA | 73 km (45 mi) | S | earthquakes near Butte County |
| Plumas County, CA | 83 km (52 mi) | ESE | earthquakes near Plumas County |
| Glenn County, CA | 99 km (62 mi) | SW | earthquakes near Glenn County |
| Lassen County, CA | 102 km (63 mi) | ENE | earthquakes near Lassen 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.
- 1.7 12 km WSW of Manton, CA
- 2.2 11 km WSW of Manton, CA
- 1.9 12 km WSW of Manton, CA
- 2.1 21 km SE of Burney, CA
- 1.9 9 km W of Manton, CA
- 1.6 5 km WNW of Chester, CA
- 2.1 11 km WSW of Manton, CA
- 2.2 9 km WSW of Manton, CA
- 1.6 13 km SW of Mineral, CA
- 2.0 11 km W of Shingletown, CA
- 1.8 9 km E of Anderson, CA
- 2.3 18 km W of Manton, CA
- 1.9 2 km ENE of Almanor, CA
- 1.6 6 km SSE of Millville, CA
- 2.4 12 km W of Shingletown, 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.