Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Corona, CA
No earthquake was likely felt in Corona in the 24 hours to 7:29 am PST (15:29 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 1.8 earthquake was recorded 11 km (7 mi) south-southeast of Corona, CA, at 11:43 pm PDT on 9 October 2025 (06:43 UTC), 13 km deep.
USGS: 10 km SSE of Corona, CA
9 km (6 mi) SSE of Corona, CA · 85 km (53 mi) ESE of Los Angeles, CA
- When
- 11:43 pm PDT on 9 October 2025 ()
- Where
- 11 km (7 mi) south-southeast of Corona, CA · earthquakes near Corona
- Magnitude
- M 1.8 (ml)
- Depth
- 13 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 26 km WSW
- Nearest mapped fault
- Elsinore 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 398 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 4 km (2 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: El Cerrito Corona, Home Gardens, Trabuco Canyon, Norco, Rancho Santa Margarita, Woodcrest.
How big was it?
This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 730,000× the energy of this one
- Around the size people start to feel M 3.0 65× the energy of this one
- This earthquake M 1.8 about 15 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 7,700 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.4 The 1933 Long Beach, California Earthquake · 47 km WSW of this epicentre
- 6.2 3 km SE of San Bernardino, California · 42 km NE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 15 km SE of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 43 km NNW of this epicentre
- 5.4 5km S of Chino Hills, CA · 28 km NW 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 33.7850, -117.5305. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 26 km (16 mi) | WSW | earthquakes near Orange County |
| Los Angeles County, CA | 81 km (51 mi) | NW | earthquakes near Los Angeles County |
| San Diego County, CA | 110 km (68 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
55 earthquakes have been recorded within 50 km since this one.
- 1.5 6 km SE of Grand Terrace, CA
- 2.0 6 km SSW of Redlands, CA
- 3.1 5 km S of San Clemente, CA
- 1.5 2 km NNW of Loma Linda, CA
- 1.7 4 km SE of Home Gardens, CA
- 1.8 7 km N of Upland, CA
- 1.8 11 km SSW of Calimesa, CA
- 1.8 6 km SSW of Devore, CA
- 1.5 4 km SW of Redlands, CA
- 2.0 4 km NW of Redlands, CA
- 1.6 5 km NW of Redlands, CA
- 1.6 4 km NW of Redlands, CA
- 1.5 5 km S of Highland, CA
- 2.6 5 km S of Highland, CA
- 1.5 2 km N of Colton, 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.