QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

9 km WSW of Grapevine, CA

· 8.3 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kern County 54 kmVentura County 63 kmSanta Barbara County 102 kmLos Angeles 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 3.1 (ml)
Depth
8.3 km below the surface
Felt
30 reports · strongest reported intensity III
Nearest
Kern County, 54 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 74 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 30 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 34.9213, -119.0195. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kern County, CA 54 km (34 mi) SSW of here earthquakes near Kern County
Ventura County, CA 63 km (39 mi) N of here earthquakes near Ventura County
Santa Barbara County, CA 102 km (64 mi) ENE of here earthquakes near Santa Barbara County
Los Angeles County, CA 106 km (66 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

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

  1. 1.9 7 km NNW of Lamont, CA
  2. 1.5 9 km ENE of Lebec, CA
  3. 1.9 18 km NW of Grapevine, CA
  4. 1.8 3 km SSE of Frazier Park, CA
  5. 1.7 20 km NW of Ojai, CA
  6. 1.5 20 km NW of Ojai, CA
  7. 1.6 22 km S of Gorman, CA
  8. 1.6 17 km SW of Lamont, CA
  9. 2.4 2 km NNW of Frazier Park, CA
  10. 1.7 16 km SW of Lamont, CA
  11. 2.8 10 km SW of Lamont, CA
  12. 2.3 5 km W of Frazier Park, CA
  13. 1.6 3 km SSE of Frazier Park, CA
  14. 1.5 2 km NW of Frazier Park, CA
  15. 1.5 8 km W of Pine Mountain Club, 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 5.2 on 2024-08-07 — it released about 1,300 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.