QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

15km ESE of Anza, CA

· 5.6 km deep · released about 110 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 55 kmSan Diego County 57 kmOrange County 118 kmImperial County 120 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 2.4 (ml)
Depth
5.6 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Riverside County, 55 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2174 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 33.4912, -116.5268. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 55 km (34 mi) WSW of here earthquakes near Riverside County
San Diego County, CA 57 km (35 mi) NNE of here earthquakes near San Diego County
Orange County, CA 118 km (73 mi) E of here earthquakes near Orange County
Imperial County, CA 120 km (74 mi) WNW of here earthquakes near Imperial County

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

Aftershocks so far

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

  1. 2.0 7km SW of Anza, CA
  2. 2.9 7km NE of Aguanga, CA
  3. 2.2 8km SE of Valle Vista, CA
  4. 1.7 12km NE of Julian, CA
  5. 1.6 13km WNW of Anza, CA
  6. 1.5 16km ESE of Anza, CA
  7. 1.7 10km NNE of Ocotillo Wells, CA
  8. 2.4 10km NNE of Ocotillo Wells, CA
  9. 2.1 11km NNE of Ocotillo Wells, CA
  10. 1.5 10km NNE of Ocotillo Wells, CA
  11. 1.6 14km ESE of Anza, CA
  12. 1.9 11km NNE of Ocotillo Wells, CA
  13. 1.9 10km NNE of Ocotillo Wells, CA
  14. 1.6 7km WNW of Garnet, CA
  15. 2.8 11km ESE of Julian, 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 5.2 on 2016-06-10 — it released about 17,000 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.