QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

10km NNE of Cabazon, CA

· 13 km deep · released about 2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 77 kmOrange County 100 kmSan Bernardino County 109 kmSan Diego County 109 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 3.4 (ml)
Depth
13 km below the surface
Felt
117 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Riverside County, 77 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2367 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 117 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 86,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,700× the energy of this one
  4. This earthquake M 3.4 about 2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.1× 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 34.0057, -116.7643. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 77 km (48 mi) WNW of here earthquakes near Riverside County
Orange County, CA 100 km (62 mi) ENE of here earthquakes near Orange County
San Bernardino County, CA 109 km (68 mi) SSW of here earthquakes near San Bernardino County
San Diego County, CA 109 km (68 mi) N of here earthquakes near San Diego County

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

Aftershocks so far

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

  1. 1.7 1km SW of Calimesa, CA
  2. 1.6 10km NNW of Big Bear City, CA
  3. 1.9 11km NW of Big Bear Lake, CA
  4. 2.0 8km NNW of Cabazon, CA
  5. 1.6 9km SE of Valle Vista, CA
  6. 2.5 9km NW of Garnet, CA
  7. 2.1 10km S of Idyllwild, CA
  8. 2.0 9km NW of Garnet, CA
  9. 1.9 7km NNE of Anza, CA
  10. 2.4 4km WSW of Morongo Valley, CA
  11. 1.8 6km N of Beaumont, CA
  12. 1.6 13km WNW of Anza, CA
  13. 1.9 3km NE of San Jacinto, CA
  14. 1.5 10km ENE of Yucaipa, CA
  15. 1.7 11km SE of Lucerne Valley, 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 4.5 on 2018-05-08 — it released about 42 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.