Earthquake · reviewed by a seismologist
M 4.2mw
Earthquake near San Bernardino, CA
No earthquake was likely felt in San Bernardino in the 24 hours to 1:27 pm PST (21:27 UTC). The last one was M 2.1, 9 km (6 mi) SSE, at 10:40 am PDT on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near San Bernardino
This page: a magnitude 4.2 earthquake was recorded 2 km (1 mi) west of San Bernardino, CA, at 7:43 pm PST on 24 January 2024 (03:43 UTC), 16 km deep. 16,504 people have reported feeling it to USGS.
USGS: 3 km SW of San Bernardino, CA
in San Bernardino, CA
- When
- 7:43 pm PST on 24 January 2024 ()
- Where
- 2 km (1 mi) west of San Bernardino, CA · earthquakes near San Bernardino
- Magnitude
- M 4.2 (mw)
- Depth
- 16 km below the surface
- Felt
- 16,504 reports · strongest reported intensity IV
- Measured shaking
- intensity V (ShakeMap)
- USGS impact alert
- green
- Tsunami
- USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
- Nearest
- Orange County, 65 km SW
- Nearest mapped fault
- San Jacinto fault, 3 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 307 days ago
Earthquake alerts for San Bernardino, CA
Get a notification in this browser when USGS records an earthquake near San Bernardino, CA. No account or email needed.
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 light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 115 km (71 mi) from the epicentre. In San Bernardino, 2 km away, the estimate is intensity IV (light). 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: San Bernardino 2 km, intensity IV · Colton 4 km, intensity IV · Rialto 5 km, intensity IV · Muscoy 6 km, intensity IV · Loma Linda 8 km, intensity IV · Highland 10 km, intensity IV · Fontana 12 km, intensity III · Redlands 13 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 35 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 4,900× the energy of this one
- Mineral, Virginia 2011 M 5.8 220× the energy of this one
- Magna, Utah 2020 M 5.7 150× the energy of this one
- This earthquake M 4.2 about 35 tons of TNT
- Around the size people start to feel M 3.0 this one released 72× more
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 2016-01-06 — about 1.7 times the energy of this one.
Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 50 km SE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 46 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 5 km ESE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 46 km S of this epicentre
- 5.6 7km ENE of Running Springs, CA · 29 km ENE 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 34.1117, -117.3115. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 65 km (40 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 88 km (55 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 133 km (82 mi) | NE | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 2.3 8 km SSE of Wrightwood, CA
- 1.5 6 km SSW of Devore, CA
- 1.6 1 km S of Colton, CA
- 2.1 8 km N of Big Bear Lake, CA
- 1.9 10 km NNE of Yucaipa, CA
- 1.5 9 km W of Calimesa, CA
- 1.9 9 km W of Calimesa, CA
- 1.7 11 km SW of Corona, CA
- 1.6 3 km SE of Yucaipa, CA
- 1.6 6 km N of Moreno Valley, CA
- 1.6 5 km SSE of Home Gardens, CA
- 2.4 2 km SSE of Loma Linda, CA
- 1.5 4 km SE of Loma Linda, CA
- 1.6 10 km NNW of Cabazon, CA
- 1.7 11 km NNW of Banning, 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.