QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

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 2.8 earthquake was recorded 10 km (6 mi) southwest of Corona, CA, at 4:22 am PST on 5 February 2025 (12:22 UTC), 4.8 km deep. 44 people have reported feeling it to USGS.

USGS: 9 km SW of Corona, CA

9 km (5 mi) SW of Corona, CA · 76 km (47 mi) ESE of Los Angeles, CA

4:22 am PST, Feb 5, 2025 · · 4.8 km deep · released about 400 lb of TNT

Every earthquake near Corona Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 20 kmLos Angeles County 73 kmSan Diego County 118 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
4:22 am PST on 5 February 2025 ()
Where
10 km (6 mi) southwest of Corona, CA · earthquakes near Corona
Magnitude
M 2.8 (ml)
Depth
4.8 km below the surface
Felt
44 reports · strongest reported intensity V
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 565 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 25 km (16 mi) from the epicentre. In Corona, 10 km away, the estimate is intensity III (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 10 km, intensity III · North Tustin 16 km, intensity II · Norco 16 km, intensity II · Lake Forest 19 km, intensity II · Eastvale 19 km, intensity II · Rancho Santa Margarita 19 km, intensity II · Yorba Linda 19 km, intensity II · Tustin 19 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 38,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 27,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.4× the energy of this one
  4. This earthquake M 2.8 about 400 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 480 times the energy of this one.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1933 Long Beach, California Earthquake · 39 km WSW of this epicentre
  2. 6.2 3 km SE of San Bernardino, California · 47 km NE of this epicentre
  3. 6.0 The 1910 Lake Elsinore, California Earthquake · 24 km ESE of this epicentre
  4. 5.5 The 1990 Upland, California Earthquake · 38 km N of this epicentre
  5. 5.4 5km S of Chino Hills, CA · 20 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 33.8065, -117.6312. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 20 km (12 mi) SW earthquakes near Orange County
Los Angeles County, CA 73 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

45 earthquakes have been recorded within 50 km since this one.

  1. 2.1 5 km ESE of Yorba Linda, CA
  2. 1.6 4 km SE of Rowland Heights, CA
  3. 1.5 4 km SE of Home Gardens, CA
  4. 1.6 6 km NNE of Fontana, CA
  5. 1.8 3 km S of Loma Linda, CA
  6. 1.6 7 km SSE of Home Gardens, CA
  7. 2.5 3 km WSW of San Bernardino, CA
  8. 1.7 4 km ENE of Moreno Valley, CA
  9. 1.7 7 km N of Upland, CA
  10. 1.5 3 km ESE of Wildomar, CA
  11. 1.8 3 km NNE of Moreno Valley, CA
  12. 1.7 4 km SE of Home Gardens, CA
  13. 1.8 3 km SE of Loma Linda, CA
  14. 1.9 8 km NE of Moreno Valley, CA
  15. 1.7 1 km ENE of Loma Linda, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.