QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

5km NE of Wildomar, CA

· 15 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 50 kmSan Diego County 81 kmLos Angeles County 113 kmRiverside County 115 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 1.8 (ml)
Depth
15 km below the surface
Felt
4 reports · strongest reported intensity II
Nearest
Orange County, 50 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1754 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 33.6348, -117.2422. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 50 km (31 mi) E of here earthquakes near Orange County
San Diego County, CA 81 km (50 mi) NNW of here earthquakes near San Diego County
Los Angeles County, CA 113 km (70 mi) ESE of here earthquakes near Los Angeles County
Riverside County, CA 115 km (72 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

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

  1. 1.7 4km NNE of Moreno Valley, CA
  2. 1.7 4km SE of Redlands, CA
  3. 1.6 9km NE of Aguanga, CA
  4. 1.7 9km ENE of Aguanga, CA
  5. 1.5 4km SE of Home Gardens, CA
  6. 1.8 5km SSW of Redlands, CA
  7. 1.7 11km S of Idyllwild, CA
  8. 1.7 3km SSW of Calimesa, CA
  9. 1.6 9km NNW of Anza, CA
  10. 2.0 3km SE of Loma Linda, CA
  11. 1.5 5km SE of Home Gardens, CA
  12. 1.7 7km NW of Lakeland Village, CA
  13. 1.5 2km E of Yucaipa, CA
  14. 1.5 9km NE of Aguanga, CA
  15. 1.6 3km E of Loma Linda, 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 8,200 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.