QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

4km SW of Salton City, CA

· 4.8 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 50 kmImperial County 64 kmSan Diego County 79 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 1.5 (ml)
Depth
4.8 km below the surface
Felt
no reports yet
Nearest
Riverside County, 50 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1521 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 33.2775, -115.9858. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 50 km (31 mi) S of here earthquakes near Riverside County
Imperial County, CA 64 km (40 mi) WNW of here earthquakes near Imperial County
San Diego County, CA 79 km (49 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

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

  1. 2.1 7km NNE of Borrego Springs, CA
  2. 2.7 5km ESE of Ocotillo Wells, CA
  3. 1.8 5km WSW of Niland, CA
  4. 1.7 10km NNE of Ocotillo Wells, CA
  5. 1.5 10km SE of Ocotillo Wells, CA
  6. 2.8 10km SE of Ocotillo Wells, CA
  7. 1.6 10km SE of Ocotillo Wells, CA
  8. 1.7 10km SSE of Borrego Springs, CA
  9. 1.6 12km W of Niland, CA
  10. 2.1 11km NNE of Ocotillo Wells, CA
  11. 1.9 22km SSW of La Quinta, CA
  12. 2.5 23km SSW of La Quinta, CA
  13. 1.7 12km WNW of Calipatria, CA
  14. 2.2 21km NNW of Borrego Springs, CA
  15. 1.7 8km NNE of Borrego Springs, 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 420,000 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.