QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4mw

18km NW of Grapevine, CA

· 8.0 km deep · released about 1.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kern County 47 kmVentura County 76 kmSanta Barbara County 104 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 3.4 (mw)
Depth
8.0 km below the surface
Felt
22 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Kern County, 47 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1800 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 22 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 92,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,900× the energy of this one
  4. This earthquake M 3.4 about 1.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.8× 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 35.0407, -119.0837. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kern County, CA 47 km (29 mi) SW of here earthquakes near Kern County
Ventura County, CA 76 km (47 mi) N of here earthquakes near Ventura County
Santa Barbara County, CA 104 km (64 mi) ENE of here earthquakes near Santa Barbara County
Los Angeles County, CA 120 km (75 mi) NW of here earthquakes near Los Angeles County
Kings County, CA 132 km (82 mi) SSE of here earthquakes near Kings County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.0 19km E of Maricopa, CA
  2. 2.5 18km NE of Lebec, CA
  3. 1.9 18km E of Grapevine, CA
  4. 1.8 13km N of Pine Mountain Club, CA
  5. 1.8 8km ESE of Shafter, CA
  6. 1.6 22km SSW of Frazier Park, CA
  7. 2.0 14km E of Arvin, CA
  8. 3.0 15km SSE of Buttonwillow, CA
  9. 3.9 15km SSE of Buttonwillow, CA
  10. 1.8 14km E of Arvin, CA
  11. 1.6 17km NW of Grapevine, CA
  12. 1.5 11km NW of Pine Mountain Club, CA
  13. 1.9 19km NW of Grapevine, CA
  14. 1.6 13km SW of Lamont, CA
  15. 1.6 14km SW of Taft, 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.