QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

8km N of Cabazon, CA

· 17 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 79 kmOrange County 97 kmSan Diego County 108 kmSan Bernardino County 112 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
Magnitude
M 3.1 (ml)
Depth
17 km below the surface
Felt
42 reports · strongest reported intensity III
Nearest
Riverside County, 79 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1512 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 42 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× more

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.

Where

Epicentre 33.9933, -116.8012. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 79 km (49 mi) WNW of here earthquakes near Riverside County
Orange County, CA 97 km (60 mi) ENE of here earthquakes near Orange County
San Diego County, CA 108 km (67 mi) N of here earthquakes near San Diego County
San Bernardino County, CA 112 km (69 mi) SSW of here earthquakes near San Bernardino County

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

Aftershocks so far

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

  1. 2.5 7km E of Calimesa, CA
  2. 2.0 7km E of Calimesa, CA
  3. 1.6 7km E of Calimesa, CA
  4. 2.2 2km N of Colton, CA
  5. 1.8 3km NW of Hemet, CA
  6. 1.6 9km SSW of Idyllwild, CA
  7. 1.6 18km S of Joshua Tree, CA
  8. 1.5 7km E of Calimesa, CA
  9. 1.7 15km N of Cabazon, CA
  10. 1.6 7km NW of Banning, CA
  11. 1.6 7km NE of Beaumont, CA
  12. 3.0 7km NE of Beaumont, CA
  13. 1.6 1km SW of Colton, CA
  14. 2.1 7km SE of Yucca Valley, CA
  15. 2.5 10km NE of Running Springs, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2016-01-06 — it released about 75 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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