Earthquakes in San Bernardino County, California
The most recent earthquake of M2.5 or more near San Bernardino County was M 3.5, 26 km WNW of Ludlow, CA, 21 km (13 mi) W of the centre of San Bernardino County, at 6:03 am PDT on 17 April 2026, 1 km deep. 8 people reported feeling it to USGS. The estimated shaking at the centre of San Bernardino County was intensity III (weak), felt by some people at rest indoors. 10 smaller earthquakes have been recorded near San Bernardino County since.
No earthquake of M1.5 or more was recorded within 50 km (31 mi) of the centre of San Bernardino County in the last 24 hours.
- Last 24 hours
- 0
- Last 7 days
- 0
- Last 30 days
- 0 · an average 30 days here since 2016: 5.1
- Last 12 months
- 68 · largest M 4.1 on 27 March 2026
- Since 2016
- 681 earthquakes of M1.5 or more
- Largest since 2016
- M 4.3 on 19 February 2016, 36km ENE of Lucerne Valley, CA
- Nearest mapped fault
- Manix fault, 26 km from the centre to its surface trace
Latest quake, 24 hours and 7 days: the QuakeIndex database, which reads USGS every 30 seconds, read at ; 30 days and 12 months: the QuakeIndex catalogue, counted to · earthquakes of M1.5 or more within 50 km (31 mi) of the centre of San Bernardino County · shaking is estimated for the centre with the intensity equation USGS Did You Feel It? uses
Quiet QuakeIndex 0 / 100
0 quakes of M1.5 or larger in the last 7 days within 50 km. Normal for here is 0 to 1 in a week.
Compared against San Bernardino County, California's own 10 years · USGS catalogue · updated
If you felt one
- Was that an earthquake? — checks what was recorded near you in the last hour
- Report what you felt to USGS — reports go to USGS, not to us, and they are what produces the intensity maps
- Expect aftershocks, and be ready to Drop, Cover, and Hold On if you feel one; if you are in a damaged building, go outside and move away from it (Ready.gov, FEMA; what to do during and after an earthquake)
- Near the coast, go inland or to higher ground as soon as strong shaking stops (Ready.gov); official warnings are on Tsunami.gov
- Check the roads — Nevada Explorer — for Reno, Tahoe and the Sierra passes
QuakeIndex does not issue warnings or forecasts. For earthquake early warning see ShakeAlert and the MyShake app.
The last 30 days
Show these earthquakes on your own site: a free card with this strip and the latest quakes near San Bernardino County, California, for a local news site, school or neighborhood page.
Live · last 7 days
Latest earthquakes within 50 km
None within 50 km in the latest snapshot we hold; the full 7 days load from USGS as this page opens.
Source USGS · snapshot of
The last 7 days on the map
Open the full map — zoom anywhere, or find your own location →
The centre is 34.857, -116.182, the Census internal point of San Bernardino County, California from the US Census Bureau Gazetteer (2024). Activity on this page is measured within 50 km of it — the dashed circle.
Largest on record nearby
The strongest shaking this record implies at the centre of San Bernardino County, California is intensity III (weak), from the M 3.7 of 2018, 11 km away. At that level a few people indoors notice it; most do not.
| Magnitude | When | Where | Shaking here (est.) |
|---|---|---|---|
| M 4.3 | 36km ENE of Lucerne Valley, CA · felt by 1,287 | III · Weak | |
| M 4.1 | 8km WSW of Ludlow, CA · felt by 145 | III · Weak | |
| M 4.1 | 26 km WNW of Ludlow, CA · felt by 58 | III · Weak | |
| M 4.1 | 8km WSW of Ludlow, CA · felt by 20 | III · Weak | |
| M 4.0 | 12km W of Ludlow, CA · felt by 28 | III · Weak | |
| M 3.9 | 26 km WNW of Ludlow, CA · felt by 3 | III · Weak | |
| M 3.7 | 13km NE of Ludlow, CA · felt by 19 | III · Weak | |
| M 3.6 | 8km WSW of Ludlow, CA · felt by 3 | III · Weak |
From the QuakeIndex catalogue, built from the USGS FDSN event service · within 50 km of the centre above. Shaking is an estimate for the centre from magnitude, depth and distance, with the intensity equation USGS Did You Feel It? uses (Atkinson & Wald, 2007), on the Modified Mercalli scale. Ground conditions change it locally; it is a description of the past, not a hazard rating.
Before 2016
The USGS record from 1900 to 2015 lists 10 earthquakes of M5 or more within 50 km of the centre of San Bernardino County, California; the 8 largest:
- 7.1 The 1999 Hector Mine, California Earthquake · 29 km SSW of the centre
- 6.5 The 1947 Manix, California Earthquake · 35 km WNW of the centre
- 5.8 13km WSW of Ludlow, CA · 22 km SSW of the centre
- 5.5 17km WSW of Amboy, CA · 46 km SSE of the centre
- 5.4 21km SW of Ludlow, California · 33 km SSW of the centre
- 5.4 32km SSW of Ludlow, California · 47 km S of the centre
- 5.3 38km SW of Ludlow, CA · 47 km SW of the centre
- 5.1 46 km E of Barstow, California · 31 km W of the centre
USGS ComCat, M5+ from 1900 to 2015. Epicentres of early earthquakes are estimates. This is the record, not a forecast.
Nearest mapped faults
- Manix fault, 26 km from the centre of San Bernardino County, California to its surface trace
- Pisgah-Bullion fault, 26 km from the centre of San Bernardino County, California to its surface trace
- Red Pass fault, 31 km from the centre of San Bernardino County, California to its surface trace
- Bullion Mountains fault, 36 km from the centre of San Bernardino County, California to its surface trace
USGS Quaternary Fault and Fold Database, within 50 km. Near is not the same as on, and faults with no surface trace are not in it.
Be ready
Earthquakes cannot be predicted, here or anywhere, so the useful step is the one taken beforehand. The advice below is from the agencies responsible for it.
- Ready.gov: earthquakes (FEMA) — what to do before, during and after, including Drop, Cover, and Hold On
- Build a kit (FEMA) — water, food and supplies for several days; our summary
- USGS: preparedness — the hazard behind the advice, from the agency that records every quake on this page
- The Great ShakeOut — the yearly earthquake drill, with material for homes, schools and workplaces
- ShakeAlert covers San Bernardino County, California: alerts reach phones through Wireless Emergency Alerts and the MyShake app, seconds before shaking arrives
- Tsunami.gov (NOAA) — the official tsunami warnings for the coast; a quake page here never stands in for one
- California Earthquake Authority — retrofit grants and the state's not-for-profit earthquake insurance