QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5mw

27km ESE of Boron, CA

· 2.4 km deep · released about 2.7 tons 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 3.5 (mw)
Depth
2.4 km below the surface
Felt
49 reports · strongest reported intensity IV
Measured shaking
intensity VI (ShakeMap)
Nearest
Los Angeles County, 110 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 713 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 49 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 34.8752, -117.3905. 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 (69 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

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

  1. 1.7 5km NW of Boron, CA
  2. 1.6 5km NW of Boron, CA
  3. 1.6 16km NNE of Apple Valley, CA
  4. 2.3 26km ESE of Boron, CA
  5. 2.4 27km ESE of Boron, CA
  6. 1.7 5km NNW of Boron, CA
  7. 1.8 4km NNW of Boron, CA
  8. 2.8 12km NE of Barstow, CA
  9. 1.6 5km NNW of Boron, CA
  10. 1.8 16 km NNE of Apple Valley, CA
  11. 1.9 22km NNE of Barstow, CA
  12. 1.6 16 km NNE of Apple Valley, CA
  13. 1.7 18km NE of Boron, CA
  14. 1.8 5km NW of Boron, CA
  15. 2.0 12km NE of Barstow, 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.