QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1mw

24 km SW of Lamont, CA

· 12 km deep · released about 21 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kern County 43 kmVentura County 84 kmSanta Barbara County 106 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 4.1 (mw)
Depth
12 km below the surface
Felt
944 reports · strongest reported intensity VII
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Kern County, 43 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 706 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 944 people have reported feeling it to USGS.

How big was it?

This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 8,200× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 370× the energy of this one
  3. Magna, Utah 2020 M 5.7 260× the energy of this one
  4. This earthquake M 4.1 about 21 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 43× 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 35.1132, -119.1115. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kern County, CA 43 km (27 mi) SW of here earthquakes near Kern County
Ventura County, CA 84 km (52 mi) N of here earthquakes near Ventura County
Santa Barbara County, CA 106 km (66 mi) NE of here earthquakes near Santa Barbara County
Kings County, CA 124 km (77 mi) SSE of here earthquakes near Kings County
Los Angeles County, CA 128 km (80 mi) NW of here earthquakes near Los Angeles 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. 2.3 22 km NW of Grapevine, CA
  2. 2.2 25 km ENE of Maricopa, CA
  3. 2.2 25 km SW of Lamont, CA
  4. 2.0 24 km NW of Grapevine, CA
  5. 2.3 22 km NW of Grapevine, CA
  6. 2.3 21 km NW of Grapevine, CA
  7. 3.2 23 km NW of Grapevine, CA
  8. 2.0 24 km NW of Grapevine, CA
  9. 2.5 21 km NW of Grapevine, CA
  10. 2.5 15 km NW of Grapevine, CA
  11. 2.2 20 km NNW of Grapevine, CA
  12. 3.1 24 km NW of Grapevine, CA
  13. 2.9 23 km NW of Grapevine, CA
  14. 3.6 23 km NW of Grapevine, CA
  15. 4.1 22 km SW of Lamont, 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.