QuakeIndex

Earthquake · reviewed by a seismologist

M 0.3ml

Earthquake near Corona, CA

Yes. A magnitude 0.3 earthquake was recorded 9 km (6 mi) SW of Corona, CA, at 12:45 pm PDT on 6 October 2026 (19:45 UTC), 5.6 km deep.

This was on 6 October 2026. The latest near Corona: M 2.7 on 8 October 2026.

USGS: 9 km WSW of Corona, CA

9 km (5 mi) WSW of Corona, CA · 73 km (46 mi) ESE of Los Angeles, CA

12:45 pm PDT, Oct 6, 2026 · · 5.6 km deep · released about 0.077 lb of TNT

10 km30 km60 km120 km N Orange County 20 kmLos Angeles County 70 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
12:45 pm PDT on 6 October 2026 ()
Where
9 km (6 mi) SW of Corona, CA · earthquakes near Corona
Magnitude
M 0.3 (ml)
Depth
5.6 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 7 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. 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, Norco, North Tustin, Villa Park, Yorba Linda.

How big was it?

This earthquake released about 0.077 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 1.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 12,000× the energy of this one
  4. This earthquake M 0.3 about 0.077 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 2,500,000 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

  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 · 46 km NE of this epicentre
  3. 6.0 The 1910 Lake Elsinore, California Earthquake · 27 km ESE of this epicentre
  4. 5.9 The 1987 Whittier Narrows, California Earthquake · 47 km WNW of this epicentre
  5. 5.5 The 1990 Upland, California Earthquake · 36 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 33.8258, -117.6495. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 20 km (13 mi) SW earthquakes near Orange County
Los Angeles County, CA 70 km (43 mi) NW earthquakes near Los Angeles County
San Diego County, CA 121 km (75 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

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

  1. 1.6 3 km S of Fontana, CA
  2. 0.9 2 km ESE of Loma Linda, CA
  3. 0.9 2 km E of Loma Linda, CA
  4. 0.4 3 km ESE of Wildomar, CA
  5. 1.1 3 km S of Fontana, CA
  6. 1.1 1 km S of Loma Linda, CA
  7. 1.0 2 km NNE of Loma Linda, CA
  8. 1.5 2 km NE of Colton, CA
  9. 0.9 2 km N of Loma Linda, CA
  10. 0.8 4 km SSW of Redlands, CA
  11. 1.0 4 km SE of Loma Linda, CA
  12. 0.9 5 km SSW of Redlands, CA
  13. 1.5 7 km SSE of Home Gardens, CA
  14. 1.7 5 km SE of Ontario, CA
  15. 1.7 5 km SW of Lytle Creek, 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.