QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

25km WSW of Alpaugh, CA

· 22 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kings County 34 kmSan Luis Obispo County 78 kmTulare County 99 kmKern County 102 kmFresno 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 1.8 (ml)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Kings County, 34 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2657 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 35.7727, -119.7285. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kings County, CA 34 km (21 mi) SSE of here earthquakes near Kings County
San Luis Obispo County, CA 78 km (48 mi) ENE of here earthquakes near San Luis Obispo County
Tulare County, CA 99 km (62 mi) WSW of here earthquakes near Tulare County
Kern County, CA 102 km (63 mi) WNW of here earthquakes near Kern County
Fresno County, CA 110 km (68 mi) S of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 1.8 8km E of Kettleman City, CA
  2. 2.6 6km SW of Shafter, CA
  3. 2.6 21km SE of Kettleman City, CA
  4. 1.9 6km WSW of Shafter, CA
  5. 2.0 12km NNW of Kettleman City, CA
  6. 2.0 12km SSW of Lemoore Station, CA
  7. 2.6 7km SE of Kettleman City, CA
  8. 3.2 6km SSE of Kettleman City, CA
  9. 1.9 14km WSW of Stratford, CA
  10. 1.6 6km WSW of Shafter, CA
  11. 1.8 11km SW of Stratford, CA
  12. 1.9 11km NNW of Kettleman City, CA
  13. 1.9 10km SW of Stratford, CA
  14. 1.7 3km ENE of Buttonwillow, CA
  15. 1.6 5km ESE of Cholame, 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 4.9 on 2016-02-24 — it released about 35,000 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.