Earthquake · reviewed by a seismologist
M 3.4ml
Earthquake near San Bernardino, CA
No earthquake was likely felt in San Bernardino in the 24 hours to 5:01 pm PST (01:01 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 3.4 earthquake was recorded 2 km (2 mi) west of San Bernardino, CA, at 6:05 am PDT on 11 April 2019 (13:05 UTC), 16 km deep. 623 people have reported feeling it to USGS.
USGS: 3km SW of San Bernardino, CA
in San Bernardino, CA
- When
- 6:05 am PDT on 11 April 2019 ()
- Where
- 2 km (2 mi) west of San Bernardino, CA · earthquakes near San Bernardino
- Magnitude
- M 3.4 (ml)
- Depth
- 16 km below the surface
- Felt
- 623 reports · strongest reported intensity IV
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Orange County, 64 km SW
- Nearest mapped fault
- San Jacinto fault, 2 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 2414 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 55 km (34 mi) from the epicentre. In San Bernardino, 2 km away, the estimate is intensity III (weak). 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 III · Colton 4 km, intensity III · Rialto 5 km, intensity III · Muscoy 5 km, intensity III · Loma Linda 9 km, intensity III · Highland 10 km, intensity III · Fontana 11 km, intensity III · Redlands 14 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 89,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,800× the energy of this one
- This earthquake M 3.4 about 1.9 tons of TNT
- Around the size people start to feel M 3.0 this one released 4× 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 31 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 6.3 The 1992 Big Bear, California Earthquake · 46 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 6 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
- 5.5 The 1990 Upland, California Earthquake · 35 km W 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 34.1107, -117.3162. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 64 km (40 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 88 km (54 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 133 km (83 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
48 earthquakes have been recorded within 50 km since this one.
- 1.8 4km NNW of Glen Avon, CA
- 1.6 4km NNW of Glen Avon, CA
- 1.7 4km NNW of Glen Avon, CA
- 2.6 4km NNW of Glen Avon, CA
- 1.8 4km NNW of Glen Avon, CA
- 2.4 4km NNW of Glen Avon, CA
- 2.0 4km SE of Banning, CA
- 2.1 4km NNW of Glen Avon, CA
- 1.6 4km NNW of Glen Avon, CA
- 2.1 4km NNW of Glen Avon, CA
- 1.9 4km NNW of Glen Avon, CA
- 1.6 4km NNW of Glen Avon, CA
- 1.9 8km SSE of Home Gardens, CA
- 1.8 4km NNW of Glen Avon, CA
- 1.6 4km NW of Glen Avon, 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.