QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

8km ESE of Lucerne Valley, CA

· 1.9 km deep · released about 3.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 82 kmRiverside County 111 kmOrange 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 3.6 (ml)
Depth
1.9 km below the surface
Felt
129 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
Nearest
San Bernardino County, 82 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2719 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 129 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 51,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,600× the energy of this one
  4. This earthquake M 3.6 about 3.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.9× 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 34.4077, -116.8918. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Bernardino County, CA 82 km (51 mi) SW of here earthquakes near San Bernardino County
Riverside County, CA 111 km (69 mi) NW of here earthquakes near Riverside County
Orange County, CA 115 km (72 mi) NE of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.3 10km NNE of Big Bear City, CA
  2. 1.8 10km NNE of Big Bear City, CA
  3. 2.2 12km WSW of Morongo Valley, CA
  4. 1.6 5km NW of Big Bear City, CA
  5. 1.6 5km NW of Big Bear City, CA
  6. 1.8 9km N of Banning, CA
  7. 2.1 12km N of Big Bear City, CA
  8. 1.8 3km W of Redlands, CA
  9. 1.5 8km NNE of Beaumont, CA
  10. 2.5 8km NNE of Beaumont, CA
  11. 1.8 9km NE of Lake Arrowhead, CA
  12. 2.1 11km NE of Big Bear City, CA
  13. 1.6 8km NW of Big Bear City, CA
  14. 2.5 6km S of Big Bear City, CA
  15. 1.6 7km E of Yucaipa, 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 4.5 on 2018-05-08 — it released about 25 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.