QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

5km NW of Mira Loma, CA

· 9.6 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 44 kmLos Angeles County 68 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 2.3 (ml)
Depth
9.6 km below the surface
Felt
14 reports · strongest reported intensity III
Nearest
Orange County, 44 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2224 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 14 people have reported feeling it to USGS.

How big was it?

This earthquake released about 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 34.0282, -117.5500. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 44 km (28 mi) NNE of here earthquakes near Orange County
Los Angeles County, CA 68 km (42 mi) ESE of here earthquakes near Los Angeles County
San Diego County, CA 133 km (82 mi) NNW 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

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

  1. 1.8 5km SSE of Home Gardens, CA
  2. 1.6 1km ESE of Loma Linda, CA
  3. 1.6 4km W of South El Monte, CA
  4. 1.6 11km WNW of Lake Elsinore, CA
  5. 1.6 3km NNW of Brea, CA
  6. 1.6 9km SSE of Chino, CA
  7. 1.6 8km SSE of Home Gardens, CA
  8. 2.6 1km NNW of Loma Linda, CA
  9. 1.5 3km SW of La Mirada, CA
  10. 2.5 8km NNW of Rancho Cucamonga, CA
  11. 1.6 4km SSW of Lytle Creek, CA
  12. 1.6 11km NW of Rancho Cucamonga, CA
  13. 1.7 2km NE of Moreno Valley, CA
  14. 2.3 3km WSW of South El Monte, CA
  15. 3.2 11km NW of Rancho Cucamonga, 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 2018-08-29 — it released about 1,300 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.