QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

31km W of Olancha, CA

· -1.5 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tulare County 40 kmInyo County 88 kmKern County 113 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
-1.5 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Tulare County, 40 km WSW
Status
Reviewed by a seismologist

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

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 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 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 36.3178, -118.3455. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tulare County, CA 40 km (25 mi) ENE of here earthquakes near Tulare County
Inyo County, CA 88 km (55 mi) WSW of here earthquakes near Inyo County
Kern County, CA 113 km (70 mi) NNE of here earthquakes near Kern County
Fresno County, CA 127 km (79 mi) ESE of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 1.9 17km WSW of Olancha, CA
  2. 2.4 17km WSW of Olancha, CA
  3. 2.1 17km WSW of Olancha, CA
  4. 1.9 13km NE of Coso Junction, CA
  5. 1.6 8km NE of Coso Junction, CA
  6. 1.8 10km NE of Coso Junction, CA
  7. 1.9 10km NNE of Coso Junction, CA
  8. 1.9 10km NE of Coso Junction, CA
  9. 1.7 14km SE of Olancha, CA
  10. 1.8 10km S of Olancha, CA
  11. 2.0 12km NE of Coso Junction, CA
  12. 1.5 15km SE of Olancha, CA
  13. 1.9 11km S of Olancha, CA
  14. 1.8 9km NE of Coso Junction, CA
  15. 2.0 12km N of Coso Junction, 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 4.6 on 2019-07-18 — it released about 200 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.