QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

7km W of Holtville, CA

· 12 km deep · released about 860 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 27 kmRiverside County 114 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 3.0 (ml)
Depth
12 km below the surface
Felt
12 reports · strongest reported intensity III
Nearest
Imperial County, 27 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1828 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 860 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 390,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 860 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 32.8120, -115.4600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Imperial County, CA 27 km (17 mi) SSW of here earthquakes near Imperial County
Riverside County, CA 114 km (71 mi) SSE of here earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.9 27km WSW of Westmorland, CA
  2. 2.1 27km SE of Ocotillo Wells, CA
  3. 2.2 14km N of Ocotillo, CA
  4. 2.2 14km N of Ocotillo, CA
  5. 1.8 8km W of Progreso, B.C., MX
  6. 1.8 11km W of Calipatria, CA
  7. 2.0 10km WSW of Niland, CA
  8. 2.9 19km N of Ocotillo, CA
  9. 1.8 8km W of Progreso, B.C., MX
  10. 1.9 9km W of Calipatria, CA
  11. 1.6 7km SW of Niland, CA
  12. 1.8 9km SW of Niland, CA
  13. 1.9 15km WNW of Progreso, B.C., MX
  14. 1.9 8km SSW of Progreso, B.C., MX
  15. 1.6 9km SW of Niland, 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 2,600 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.