Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Corona, CA
No earthquake was likely felt in Corona in the 24 hours to 6:41 am PST (14:41 UTC). The last one was M 1.6, 9 km (6 mi) SE, at 1:57 pm PST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Corona
This page: a magnitude 1.6 earthquake was recorded 11 km (7 mi) west of Corona, CA, at 1:24 am PST on 3 December 2021 (09:24 UTC), 9.5 km deep.
USGS: 11km W of Corona, CA
7 km (4 mi) ENE of Anaheim, CA · 69 km (43 mi) ESE of Los Angeles, CA
- When
- 1:24 am PST on 3 December 2021 ()
- Where
- 11 km (7 mi) west of Corona, CA · earthquakes near Corona
- Magnitude
- M 1.6 (ml)
- Depth
- 9.5 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 24 km SSW
- Nearest mapped fault
- Elsinore 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 1805 days ago
Earthquake alerts for Corona, 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, people at rest would likely notice it out to about 5 km (3 mi) from the epicentre. In Corona, 11 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: Los Serranos, Yorba Linda, Villa Park, Norco, Chino Hills, Eastvale.
How big was it?
This earthquake released about 6.6 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 2,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
- Around the size people start to feel M 3.0 140× the energy of this one
- This earthquake M 1.6 about 6.6 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 4.5 on 2020-09-19 — about 30,000 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.4 The 1933 Long Beach, California Earthquake · 40 km SW of this epicentre
- 6.2 3 km SE of San Bernardino, California · 46 km ENE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 33 km SE of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 42 km WNW of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 30 km N 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 33.8743, -117.6860. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 24 km (15 mi) | SSW | earthquakes near Orange County |
| Los Angeles County, CA | 64 km (40 mi) | NW | earthquakes near Los Angeles County |
| San Diego County, CA | 127 km (79 mi) | SE | earthquakes near San Diego County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.7 10km SW of Laguna Beach, CA
- 1.5 2km NW of Loma Linda, CA
- 1.8 3km SSW of San Bernardino, CA
- 1.5 3km ESE of Loma Linda, CA
- 1.8 8km N of Glendora, CA
- 2.6 2km S of Redlands, CA
- 1.5 4km SSW of Redlands, CA
- 1.6 2km NNW of Fontana, CA
- 1.5 2km E of Home Gardens, CA
- 1.5 4km SE of Home Gardens, CA
- 1.7 6km WNW of Fontana, CA
- 3.6 13km NE of Trabuco Canyon, CA
- 1.7 4km NNW of Fontana, CA
- 2.1 2km S of Devore, CA
- 1.9 2km S of Devore, 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.