QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11km ENE of Ocotillo Wells, CA

· 6.3 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 61 kmImperial County 64 kmSan Diego County 73 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
6.3 km below the surface
Felt
no reports yet
Nearest
Riverside County, 61 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1476 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 33.1780, -116.0175. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 61 km (38 mi) S of here earthquakes near Riverside County
Imperial County, CA 64 km (39 mi) WNW of here earthquakes near Imperial County
San Diego County, CA 73 km (45 mi) ENE of here earthquakes near San Diego County

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

Aftershocks so far

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

  1. 2.7 26km WSW of Westmorland, CA
  2. 1.7 22km SSW of La Quinta, CA
  3. 1.9 10km ENE of Ocotillo Wells, CA
  4. 2.0 4km SSW of Niland, CA
  5. 1.7 13km ENE of Borrego Springs, CA
  6. 1.6 15km ENE of Ocotillo, CA
  7. 1.8 5km WNW of Borrego Springs, CA
  8. 1.9 13km NNW of Ocotillo, CA
  9. 2.1 13km ENE of Borrego Springs, CA
  10. 1.9 5km WNW of Bombay Beach, CA
  11. 1.8 8km NE of Ocotillo Wells, CA
  12. 1.6 8km WNW of Imperial, CA
  13. 1.6 21km SW of Ocotillo Wells, CA
  14. 1.5 15km W of Imperial, CA
  15. 2.1 21km SW of Ocotillo Wells, 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 5.3 on 2021-06-05 — it released about 150,000 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.