QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0ml

1km ESE of Wildomar, CA

· 14 km deep · released about 13 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 48 kmSan Diego County 78 kmLos Angeles County 113 kmRiverside County 118 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 4.0 (ml)
Depth
14 km below the surface
Felt
4220 reports · strongest reported intensity V
Measured shaking
intensity VI (ShakeMap)
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Orange County, 48 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 531 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4220 people have reported feeling it to USGS.

How big was it?

This earthquake released about 13 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 13,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 580× the energy of this one
  3. Magna, Utah 2020 M 5.7 410× the energy of this one
  4. This earthquake M 4.0 about 13 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 28× 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 33.5940, -117.2700. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 48 km (30 mi) E of here earthquakes near Orange County
San Diego County, CA 78 km (49 mi) NW of here earthquakes near San Diego County
Los Angeles County, CA 113 km (70 mi) SE of here earthquakes near Los Angeles County
Riverside County, CA 118 km (74 mi) W of here earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.7 5km SE of Home Gardens, CA
  2. 2.6 11km WNW of Lake Elsinore, CA
  3. 1.6 8km ENE of Aguanga, CA
  4. 1.5 5km SSE of Home Gardens, CA
  5. 1.7 7km NE of Moreno Valley, CA
  6. 1.8 6km ENE of North Tustin, CA
  7. 1.7 1km SW of Calimesa, CA
  8. 1.6 9km SE of Valle Vista, CA
  9. 1.6 7km NW of Aguanga, CA
  10. 1.7 5km NNE of Pala, CA
  11. 1.6 13km WNW of Anza, CA
  12. 1.6 5 km SE of Home Gardens, CA
  13. 1.9 3km NE of San Jacinto, CA
  14. 1.7 6km SSE of Mentone, CA
  15. 1.6 3km SE of Home Gardens, 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 4.4 on 2018-08-15 — it released about 4.7 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.