QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

6km NW of Mira Loma, CA

· 11 km deep · released about 1,000 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 44 kmLos Angeles County 67 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
11 km below the surface
Felt
94 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Orange County, 44 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2017 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 94 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,000 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 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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 34.0268, -117.5683. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 44 km (27 mi) NNE of here earthquakes near Orange County
Los Angeles County, CA 67 km (41 mi) ESE of here earthquakes near Los Angeles County
San Diego County, CA 134 km (83 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

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

  1. 1.5 6km NNW of Glen Avon, CA
  2. 2.0 4km SSW of Lytle Creek, CA
  3. 1.9 1km E of Redlands, CA
  4. 2.4 3km S of Loma Linda, CA
  5. 1.7 1km ENE of Redlands, CA
  6. 2.0 5km S of Redlands, CA
  7. 2.1 7km NE of North Tustin, CA
  8. 1.8 4km SE of Home Gardens, CA
  9. 2.0 5km S of Redlands, CA
  10. 2.0 3km SSE of Devore, CA
  11. 2.1 7km E of Yorba Linda, CA
  12. 1.6 2km SE of Home Gardens, CA
  13. 1.7 6km ENE of North Tustin, CA
  14. 1.9 8km SSW of Lytle Creek, CA
  15. 1.9 2km E of Colton, 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 110 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.