QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

22km W of Alpaugh, CA

· 20 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kings County 21 kmSan Luis Obispo County 86 kmTulare County 93 kmFresno County 96 kmKern 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 2.1 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Kings County, 21 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3079 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 lb of TNT

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 35.8990, -119.7343. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kings County, CA 21 km (13 mi) SSE of here earthquakes near Kings County
San Luis Obispo County, CA 86 km (53 mi) NE of here earthquakes near San Luis Obispo County
Tulare County, CA 93 km (58 mi) WSW of here earthquakes near Tulare County
Fresno County, CA 96 km (60 mi) S of here earthquakes near Fresno County
Kern County, CA 110 km (68 mi) NW of here earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.8 5km ESE of Huron, CA
  2. 1.9 6km SE of Huron, CA
  3. 2.8 7km SSE of Huron, CA
  4. 1.8 0km E of Kettleman City, CA
  5. 1.6 12km WNW of Avenal, CA
  6. 1.5 12km WNW of Avenal, CA
  7. 2.5 13km WNW of Avenal, CA
  8. 1.7 10km WSW of Huron, CA
  9. 2.1 5km WNW of Kettleman City, CA
  10. 2.8 3km NW of Kettleman City, CA
  11. 1.8 2km SSW of Huron, CA
  12. 1.9 1km ESE of Huron, CA
  13. 1.6 11km SW of Huron, CA
  14. 2.1 5km SSE of Avenal, CA
  15. 1.6 11km SW of Huron, 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.