QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0mw

16km SE of Olancha, CA

· 1.5 km deep · released about 16 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Inyo County 60 kmTulare County 81 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 4.0 (mw)
Depth
1.5 km below the surface
Felt
29 reports · strongest reported intensity III
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Nearest
Inyo County, 60 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1653 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 29 people have reported feeling it to USGS.

How big was it?

This earthquake released about 16 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 10,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 470× the energy of this one
  3. Magna, Utah 2020 M 5.7 330× the energy of this one
  4. This earthquake M 4.0 about 16 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 34× 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 36.1793, -117.8830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Inyo County, CA 60 km (38 mi) SW of here earthquakes near Inyo County
Tulare County, CA 81 km (50 mi) E of here earthquakes near Tulare County
Kern County, CA 120 km (75 mi) NE of here earthquakes near Kern County

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

Aftershocks so far

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

  1. 2.4 6km NE of Coso Junction, CA
  2. 1.8 17km ESE of Little Lake, CA
  3. 1.6 15km ESE of Little Lake, CA
  4. 1.7 19km E of Little Lake, CA
  5. 3.2 14km NNE of Coso Junction, CA
  6. 1.6 15km SE of Olancha, CA
  7. 2.4 15km E of Little Lake, CA
  8. 2.6 21km WNW of Searles Valley, CA
  9. 3.5 20km E of Coso Junction, CA
  10. 1.5 24km ESE of Little Lake, CA
  11. 2.1 15km SE of Olancha, CA
  12. 1.6 13km NE of Coso Junction, CA
  13. 1.8 10km ENE of Coso Junction, CA
  14. 1.9 21km ENE of Little Lake, CA
  15. 3.1 21km E 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 5.5 on 2019-07-06 — it released about 170 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.