Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Magalia, CA
No earthquake was likely felt in Magalia in the 24 hours to 1:35 am PST (09:35 UTC). The last one was M 5.6, 150 km (93 mi) WSW, at 8:10 am PDT on 24 June 2026, estimated intensity III (weak) in town; 5,311 felt reports to USGS. Every earthquake near Magalia
This page: a magnitude 1.6 earthquake was recorded 50 km (31 mi) north of Magalia, CA, at 5:57 pm PDT on 24 August 2025 (00:57 UTC), 8.4 km deep.
USGS: 13 km SW of Mineral, CA
57 km (36 mi) NNE of Chico, CA
- When
- 5:57 pm PDT on 24 August 2025 ()
- Where
- 50 km (31 mi) north of Magalia, CA · earthquakes near Magalia
- Magnitude
- M 1.6 (md)
- Depth
- 8.4 km below the surface
- Felt
- no reports yet
- Nearest
- Tehama County, 51 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 435 days ago
Earthquake alerts for Magalia, 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 7 km (4 mi) from the epicentre. In Magalia, 50 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.
How big was it?
This earthquake released about 6.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
- Around the size people start to feel M 3.0 140× the energy of this one
- This earthquake M 1.6 about 6.6 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 5.5 on 2023-05-11 — about 760,000 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 · 27 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 40.2578, -121.6538. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Tehama County, CA | 51 km (32 mi) | WSW | earthquakes near Tehama County |
| Shasta County, CA | 65 km (40 mi) | NNW | earthquakes near Shasta County |
| Butte County, CA | 66 km (41 mi) | S | earthquakes near Butte County |
| Plumas County, CA | 76 km (48 mi) | ESE | earthquakes near Plumas County |
| Glenn County, CA | 97 km (60 mi) | SW | earthquakes near Glenn County |
| Lassen County, CA | 101 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
57 earthquakes have been recorded within 50 km since this one.
- 1.9 1 km NNW of Prattville, CA
- 1.8 24 km NE of Viola, CA
- 1.9 3 km NNE of Prattville, CA
- 1.8 16 km S of Mineral, CA
- 2.5 3 km NE of Almanor, CA
- 1.7 2 km N of Prattville, CA
- 1.9 2 km N of Prattville, CA
- 2.0 3 km NNE of Prattville, CA
- 2.3 13 km NNW of Chico, CA
- 1.9 4 km WSW of Hamilton Branch, CA
- 2.1 13 km NNE of Mineral, CA
- 1.7 10 km SW of Shingletown, CA
- 2.1 19 km ESE of Anderson, CA
- 2.1 16 km SE of Anderson, CA
- 1.7 9 km WSW 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.