QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

32km ENE of Big Bear City, CA

· 8.1 km deep · released about 2.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 59 kmRiverside County 92 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 3.4 (ml)
Depth
8.1 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
San Bernardino County, 59 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3589 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 2.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 80,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,500× the energy of this one
  4. This earthquake M 3.4 about 2.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.4× 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 34.4195, -116.5495. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Bernardino County, CA 59 km (37 mi) SW of here earthquakes near San Bernardino County
Riverside County, CA 92 km (57 mi) NNW of here earthquakes near Riverside County
Orange County, CA 140 km (87 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

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

  1. 1.8 11km WNW of Big Bear Lake, CA
  2. 1.5 11km NE of Running Springs, CA
  3. 2.5 8km N of Big Bear City, CA
  4. 1.7 18km WNW of Morongo Valley, CA
  5. 1.6 10km NNW of Big Bear City, CA
  6. 1.9 11km SW of Morongo Valley, CA
  7. 2.1 14km NW of Morongo Valley, CA
  8. 1.8 13km NNE of Cabazon, CA
  9. 1.5 20km SSW of Ludlow, CA
  10. 1.9 9km S of Big Bear City, CA
  11. 1.6 5km SW of Morongo Valley, CA
  12. 1.5 11km SSW of Lucerne Valley, CA
  13. 2.1 11km SSE of Big Bear Lake, CA
  14. 1.6 11km SSE of Big Bear Lake, CA
  15. 1.6 10km NNW of Big Bear City, 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 4.3 on 2016-02-20 — it released about 21 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.