Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Corona, CA
No earthquake was likely felt in Corona in the 24 hours to 6:04 am PST (14:04 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 1.5 earthquake was recorded 10 km (6 mi) southwest of Corona, CA, at 10:34 pm PDT on 1 October 2025 (05:34 UTC), 4.9 km deep.
USGS: 9 km SW of Corona, CA
9 km (5 mi) SW of Corona, CA · 76 km (47 mi) ESE of Los Angeles, CA
- When
- 10:34 pm PDT on 1 October 2025 ()
- Where
- 10 km (6 mi) southwest of Corona, CA · earthquakes near Corona
- Magnitude
- M 1.5 (ml)
- Depth
- 4.9 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 20 km SW
- 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 406 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 9 km (6 mi) from the epicentre. In Corona, 10 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, North Tustin, Norco, Trabuco Canyon, Villa Park.
How big was it?
This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.6 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 35,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.4 The 1933 Long Beach, California Earthquake · 39 km WSW of this epicentre
- 6.2 3 km SE of San Bernardino, California · 47 km NE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 25 km ESE of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 50 km NW of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 38 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 33.8078, -117.6332. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 20 km (12 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 72 km (45 mi) | NW | earthquakes near Los Angeles County |
| San Diego County, CA | 118 km (73 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.
- 1.6 5 km SSW of Redlands, CA
- 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 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.