Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Corona, CA
No earthquake was likely felt in Corona in the 24 hours to 4:22 am PST (12:22 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 1.9 earthquake was recorded 6 km (4 mi) northwest of Corona, CA, at 1:31 am PDT on 24 October 2020 (08:31 UTC), 3.5 km deep. 10 people have reported feeling it to USGS.
USGS: 6km NW of Corona, CA
7 km (4 mi) NW of Corona, CA · 74 km (46 mi) E of Los Angeles, CA
- When
- 1:31 am PDT on 24 October 2020 ()
- Where
- 6 km (4 mi) northwest of Corona, CA · earthquakes near Corona
- Magnitude
- M 1.9 (ml)
- Depth
- 3.5 km below the surface
- Felt
- 10 reports · strongest reported intensity III
- Nearest
- Orange County, 30 km SSW
- Nearest mapped fault
- Elsinore fault, 5 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 2208 days ago
Earthquake alerts for Corona, CA
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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 14 km (9 mi) from the epicentre. In Corona, 6 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.
Likely felt in: Corona 6 km, intensity II · Norco 7 km, intensity II · Eastvale 8 km, intensity II · Chino 13 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 730,000× the energy of this one
- Magna, Utah 2020 M 5.7 520,000× the energy of this one
- Around the size people start to feel M 3.0 46× the energy of this one
- This earthquake M 1.9 about 21 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 9,400 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 · 47 km SW of this epicentre
- 6.2 3 km SE of San Bernardino, California · 39 km ENE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 31 km SE of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 46 km WNW of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 27 km NNW 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 33.9070, -117.6193. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 30 km (18 mi) | SSW | earthquakes near Orange County |
| Los Angeles County, CA | 67 km (42 mi) | WNW | earthquakes near Los Angeles County |
| San Diego County, CA | 126 km (78 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
59 earthquakes have been recorded within 50 km since this one.
- 1.9 6km WNW of Calimesa, CA
- 1.8 8km ENE of Moreno Valley, CA
- 1.5 2km SW of La Habra, CA
- 1.6 2km SW of La Habra, CA
- 1.7 2km SE of Placentia, CA
- 2.7 2km SSE of Placentia, CA
- 1.6 3km W of South El Monte, CA
- 1.8 2km NNE of Villa Park, CA
- 1.6 7km SSE of Home Gardens, CA
- 1.6 4km SE of Home Gardens, CA
- 2.4 8km NNW of Fontana, CA
- 1.5 5km SSE of Crestline, CA
- 1.6 2km NNW of Fontana, CA
- 1.6 4km NNW of Fontana, CA
- 1.9 2km E of Moreno Valley, 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.