Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Fontana, CA
No earthquake was likely felt in Fontana in the 24 hours to 5:53 am PST (13:53 UTC). The last one was M 1.6, 5 km (3 mi) W, at 6:17 am PDT on 26 October 2026, estimated intensity II (weak) in town. Every earthquake near Fontana
This page: a magnitude 1.6 earthquake was recorded 9 km (5 mi) north of Fontana, CA, at 11:43 am PST on 11 December 2022 (19:43 UTC), 10 km deep. 1 person has reported feeling it to USGS.
USGS: 7km SSW of Devore, CA
7 km (4 mi) NNE of Fontana, CA · 91 km (57 mi) E of Los Angeles, CA
- When
- 11:43 am PST on 11 December 2022 ()
- Where
- 9 km (5 mi) north of Fontana, CA · earthquakes near Fontana
- Magnitude
- M 1.6 (ml)
- Depth
- 10 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- Orange County, 63 km SSW
- Nearest mapped fault
- San Jacinto fault, 1 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 1426 days ago
Earthquake alerts for Fontana, CA
Get a notification in this browser when USGS records an earthquake near Fontana, 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 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 5 km (3 mi) from the epicentre. In Fontana, 9 km away, the estimate is intensity II (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.
Earthquakes near other towns within 30 km: Muscoy, Rialto, Bloomington, San Bernardino, Colton, Crestline.
How big was it?
This earthquake released about 8.1 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 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 8.1 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 2018-08-29 — about 14,000 times the energy of this one.
Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:
- 6.2 3 km SE of San Bernardino, California · 19 km ESE of this epicentre
- 5.6 7km ENE of Running Springs, CA · 37 km ENE of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 24 km W of this epicentre
- 5.4 5km S of Chino Hills, CA · 39 km SW of this epicentre
- 5.3 Near San Bernardino, California · 31 km E 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 34.1695, -117.4353. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 63 km (39 mi) | SSW | earthquakes near Orange County |
| Los Angeles County, CA | 76 km (47 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 138 km (86 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
43 earthquakes have been recorded within 50 km since this one.
- 1.7 12km NE of Running Springs, CA
- 1.6 6km ENE of Moreno Valley, CA
- 1.6 10km W of Big Bear Lake, CA
- 1.6 3km NNW of Fontana, CA
- 1.8 13km NE of Running Springs, CA
- 1.8 7km N of Yorba Linda, CA
- 1.6 4km NNW of Fontana, CA
- 1.5 14km N of Bradbury, CA
- 1.6 1km E of Loma Linda, CA
- 1.7 7km SSE of Home Gardens, CA
- 1.6 3km NNW of Fontana, CA
- 1.8 5km SW of Devore, CA
- 2.8 2km SW of Redlands, CA
- 2.1 2km SW of Redlands, CA
- 2.0 4km SE of Home Gardens, 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.