QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

5km NE of Anza, CA

· 14 km deep · released about 200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 61 kmSan Diego County 64 kmOrange County 106 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 2.5 (ml)
Depth
14 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
Riverside County, 61 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1114 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 75,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 53,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.7× the energy of this one
  4. This earthquake M 2.5 about 200 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 33.5872, -116.6408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 61 km (38 mi) WSW of here earthquakes near Riverside County
San Diego County, CA 64 km (40 mi) NNE of here earthquakes near San Diego County
Orange County, CA 106 km (66 mi) E of here earthquakes near Orange County
Imperial County, CA 134 km (83 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

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

  1. 1.8 10 km SW of Idyllwild, CA
  2. 1.8 11 km N of Borrego Springs, CA
  3. 1.8 5 km SSW of Palomar Observatory, CA
  4. 2.6 7 km S of Hemet, CA
  5. 2.0 9 km WNW of San Jacinto, CA
  6. 2.3 3 km WNW of Valle Vista, CA
  7. 2.2 4 km NW of Aguanga, CA
  8. 1.5 10 km S of Idyllwild, CA
  9. 2.3 14 km NNE of Borrego Springs, CA
  10. 1.7 14 km NNE of Borrego Springs, CA
  11. 1.7 1 km SW of San Jacinto, CA
  12. 2.3 11 km N of Cabazon, CA
  13. 1.5 12 km NE of Cabazon, CA
  14. 1.5 6 km SSW of Idyllwild, CA
  15. 1.6 3 km NW of San Jacinto, 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 9,100 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.