QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

13km WNW of Morongo Valley, CA

· 11 km deep · released about 1,400 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 77 kmSan Bernardino County 99 kmOrange County 108 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
Magnitude
M 3.1 (ml)
Depth
11 km below the surface
Felt
8 reports · strongest reported intensity III
Nearest
Riverside County, 77 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3585 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,400 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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 34.0832, -116.7145. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 77 km (48 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 99 km (61 mi) SSW of here earthquakes near San Bernardino County
Orange County, CA 108 km (67 mi) ENE of here earthquakes near Orange County
San Diego County, CA 118 km (73 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

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

  1. 1.5 6km SSW of Idyllwild, CA
  2. 1.6 12km NE of Yucaipa, CA
  3. 2.9 1km E of Loma Linda, CA
  4. 2.1 16km NW of Morongo Valley, CA
  5. 1.7 13km NNE of Cabazon, CA
  6. 2.0 2km E of Loma Linda, CA
  7. 1.8 4km WNW of Cabazon, CA
  8. 1.7 6km S of Calimesa, CA
  9. 1.7 10km NE of Running Springs, CA
  10. 1.7 6km S of Idyllwild, CA
  11. 1.6 10km N of Idyllwild, CA
  12. 2.4 4km N of Loma Linda, CA
  13. 1.9 10km SSE of Lucerne Valley, CA
  14. 1.6 4km NNE of Beaumont, CA
  15. 1.7 13km S of Joshua Tree, 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 80 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.