QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

2km ESE of Loma Linda, CA

· 18 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 64 kmLos Angeles County 96 kmRiverside County 119 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 3.0 (ml)
Depth
18 km below the surface
Felt
338 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Orange County, 64 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3166 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 338 people have reported feeling it to USGS.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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.

Where

Epicentre 34.0407, -117.2388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 64 km (40 mi) NE of here earthquakes near Orange County
Los Angeles County, CA 96 km (59 mi) E of here earthquakes near Los Angeles County
Riverside County, CA 119 km (74 mi) WNW of here earthquakes near Riverside County
San Diego County, CA 121 km (75 mi) NNW of here earthquakes near San Diego County
San Bernardino County, CA 133 km (83 mi) SW 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

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

  1. 2.5 2km NW of Big Bear City, CA
  2. 1.9 4km SE of Home Gardens, CA
  3. 1.6 4km S of Redlands, CA
  4. 1.6 9km NNW of Big Bear Lake, CA
  5. 1.9 5km N of Cabazon, CA
  6. 1.7 9km ESE of Big Bear City, CA
  7. 2.1 1km S of Loma Linda, CA
  8. 1.9 4km SE of Home Gardens, CA
  9. 1.9 5km SE of Loma Linda, CA
  10. 1.8 4km N of Beaumont, CA
  11. 2.2 4km NNW of Valle Vista, CA
  12. 1.9 5km NNW of Lake Elsinore, CA
  13. 1.8 2km NE of Redlands, CA
  14. 1.7 13km NNE of Yucaipa, CA
  15. 1.6 8km ESE of Yorba 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2016-01-06 — it released about 140 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.