QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

27km ESE of Boron, CA

· 4.9 km deep · released about 77 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 110 kmSan Bernardino County 110 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
4.9 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 110 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3258 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 77 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 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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 34.8757, -117.3893. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 110 km (68 mi) NE of here earthquakes near Los Angeles County
San Bernardino County, CA 110 km (68 mi) W 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

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

  1. 1.6 5km NW of Boron, CA
  2. 1.6 18km E of Boron, CA
  3. 1.5 15km NNE of Apple Valley, CA
  4. 2.0 19km E of Boron, CA
  5. 1.9 5km NW of Boron, CA
  6. 2.1 19km E of Boron, CA
  7. 1.8 5km NNW of Boron, CA
  8. 1.7 5km NW of Boron, CA
  9. 1.7 14km NNE of Apple Valley, CA
  10. 2.0 26km ESE of Johannesburg, CA
  11. 1.6 5km N of Boron, CA
  12. 1.7 6km N of Boron, CA
  13. 1.6 5km NNW of Boron, CA
  14. 1.9 5km N of Boron, CA
  15. 1.6 4km NNW of Boron, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.