Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Fontana, CA
No earthquake was likely felt in Fontana in the 24 hours to 2:28 pm PST (22:28 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 1.7 earthquake was recorded 8 km (5 mi) west-northwest of Fontana, CA, at 2:44 am PST on 13 February 2022 (10:44 UTC), 14 km deep.
USGS: 6km WNW of Fontana, CA
in Fontana, CA · 83 km (52 mi) E of Los Angeles, CA
- When
- 2:44 am PST on 13 February 2022 ()
- Where
- 8 km (5 mi) west-northwest of Fontana, CA · earthquakes near Fontana
- Magnitude
- M 1.7 (ml)
- Depth
- 14 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 54 km SSW
- Nearest mapped fault
- Red Hill-Etiwanda Avenue fault, 4 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 1733 days ago
Earthquake alerts for Fontana, CA
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Fontana, 8 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: Rancho Cucamonga, Glen Avon, Bloomington, Upland, Rialto, Jurupa Valley.
How big was it?
This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 95× the energy of this one
- This earthquake M 1.7 about 10 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 11,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.2 3 km SE of San Bernardino, California · 24 km E of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 47 km SSE of this epicentre
- 5.8 The 1991 Sierra Madre, California Earthquake · 47 km WNW of this epicentre
- 5.6 7km ENE of Running Springs, CA · 46 km ENE of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 17 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 34.1143, -117.5143. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 54 km (34 mi) | SSW | earthquakes near Orange County |
| Los Angeles County, CA | 69 km (43 mi) | W | earthquakes near Los Angeles County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 1.5 4km SE of Home Gardens, CA
- 2.6 4km SSW of Redlands, CA
- 1.7 8km ESE of Yorba Linda, CA
- 1.8 1km W of Yorba Linda, CA
- 1.9 8km WSW of Corona, CA
- 2.4 8km WSW of Corona, CA
- 2.0 3km ESE of Villa Park, CA
- 1.8 8km W of Big Bear Lake, CA
- 1.7 6km ESE of Yucaipa, CA
- 1.8 4km SE of Home Gardens, CA
- 1.7 7km SE of Loma Linda, CA
- 1.5 2km NE of La Habra, CA
- 1.6 4km W of Calimesa, CA
- 1.6 4km NNW of Lytle Creek, CA
- 1.6 7km S of Redlands, 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.