QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

3km NW of Aguanga, CA

· 13 km deep · released about 1,700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 50 kmOrange County 85 kmRiverside County 88 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 3.2 (ml)
Depth
13 km below the surface
Felt
159 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
San Diego County, 50 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1877 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 159 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,500× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× more

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 33.4597, -116.8917. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 50 km (31 mi) NNW of here earthquakes near San Diego County
Orange County, CA 85 km (53 mi) ESE of here earthquakes near Orange County
Riverside County, CA 88 km (54 mi) WSW of here earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.6 7km S of Idyllwild, CA
  2. 1.6 14km WNW of Anza, CA
  3. 1.7 10km NE of Aguanga, CA
  4. 1.9 4km NE of Temecula, CA
  5. 1.5 10km S of Idyllwild, CA
  6. 1.6 8km ESE of Valle Vista, CA
  7. 1.7 6km ESE of Cabazon, CA
  8. 1.6 21km ESE of Anza, CA
  9. 2.2 6km SE of Valle Vista, CA
  10. 1.7 10km S of Idyllwild, CA
  11. 3.1 2km NW of Hemet, CA
  12. 1.6 11km N of Borrego Springs, CA
  13. 1.8 6km ESE of Palomar Observatory, CA
  14. 1.6 9km S of Idyllwild, CA
  15. 1.5 10km SSW of Idyllwild, 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 1,100 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.