QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

37km SE of Fort Irwin, CA

· 1.6 km deep · released about 1,600 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 29 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 3.1 (ml)
Depth
1.6 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
San Bernardino County, 29 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2573 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× 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 34.9897, -116.4590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Bernardino County, CA 29 km (18 mi) WNW 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

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

  1. 2.8 12km NE of Barstow, CA
  2. 2.1 40km WNW of Ludlow, CA
  3. 2.0 40km WNW of Ludlow, CA
  4. 1.8 23km ENE of Barstow, CA
  5. 2.0 25 km W of Ludlow, CA
  6. 1.9 22km NNE of Barstow, CA
  7. 2.5 34km E of Barstow, CA
  8. 1.9 13km ENE of Fort Irwin, CA
  9. 1.6 23km NW of Ludlow, CA
  10. 2.0 12km NE of Barstow, CA
  11. 1.8 14km WSW of Ludlow, CA
  12. 1.9 24 km NE of Fort Irwin, California
  13. 2.3 22km NNE of Barstow, CA
  14. 2.1 10km NNW of Fort Irwin, CA
  15. 2.1 22km NNE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2016-02-20 — it released about 55 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.