QuakeIndex

Earthquake · reviewed by a seismologist

M 0.3ml

Earthquake near Calimesa, CA

Yes. A magnitude 0.3 earthquake was recorded 7 km (5 mi) ESE of Calimesa, CA, at 6:50 am PDT on 12 October 2026 (13:50 UTC), 16 km deep. No felt reports to USGS yet.

USGS: 6 km E of Calimesa, CA

7 km (5 mi) SE of Yucaipa, CA · 131 km (82 mi) E of Los Angeles, CA

6:50 am PDT, Oct 12, 2026 · · 16 km deep · released about 0.085 lb of TNT

Every earthquake near Calimesa Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 81 kmRiverside County 95 kmSan Diego County 109 kmLos Angeles County 120 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
6:50 am PDT on 12 October 2026 ()
Where
7 km (5 mi) ESE of Calimesa, CA · earthquakes near Calimesa
Magnitude
M 0.3 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Orange County, 81 km WSW
Nearest mapped fault
San Gorgonio Pass fault, under 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 18 hours 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: Cherry Valley, Beaumont, Yucaipa, Banning, Mentone, Redlands.

How big was it?

This earthquake released about 0.085 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 5.8 180,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 11,000× the energy of this one
  4. This earthquake M 0.3 about 0.085 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 2018-05-08 — about 1,900,000 times the energy of this one.

Before 2016, the USGS record lists 24 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 The 1918 San Jacinto, California Earthquake · 25 km S of this epicentre
  2. 6.3 The 1992 Big Bear, California Earthquake · 28 km NNE of this epicentre
  3. 6.2 3 km SE of San Bernardino, California · 28 km WNW of this epicentre
  4. 6.0 The 1910 Lake Elsinore, California Earthquake · 50 km SW of this epicentre
  5. 6.0 The 1986 North Palm Springs, California Earthquake · 35 km E 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 33.9858, -116.9863. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 81 km (50 mi) WSW earthquakes near Orange County
Riverside County, CA 95 km (59 mi) ESE earthquakes near Riverside County
San Diego County, CA 109 km (68 mi) S earthquakes near San Diego County
Los Angeles County, CA 120 km (74 mi) WNW earthquakes near Los Angeles County
San Bernardino County, CA 122 km (76 mi) NE earthquakes near San Bernardino County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 0.5 7 km SSW of Idyllwild, CA
  2. 0.8 8 km NNW of Cabazon, CA
  3. 0.9 9 km WNW of Anza, CA
  4. 1.6 3 km S of Fontana, CA
  5. 0.7 4 km SW of Winchester, CA
  6. 1.2 9 km WNW of Anza, CA
  7. 0.6 8 km WNW of Anza, CA
  8. 0.8 9 km WNW of Anza, CA
  9. 1.1 13 km NE of Yucaipa, CA
  10. 0.5 8 km WNW of Anza, CA
  11. 0.9 2 km ESE 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.