QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

9km S of Big Bear City, CA

· 10 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 91 kmSan Bernardino County 96 kmOrange County 104 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 1.9 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Riverside County, 91 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3518 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 34.1770, -116.8308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 91 km (57 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 96 km (60 mi) SW of here earthquakes near San Bernardino County
Orange County, CA 104 km (64 mi) ENE of here earthquakes near Orange 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. 1.7 10km NNW of Big Bear Lake, CA
  2. 1.7 10km NNW of Big Bear Lake, CA
  3. 1.7 2km E of Loma Linda, CA
  4. 1.7 4km NNW of Nuevo, CA
  5. 2.1 4km SE of Loma Linda, CA
  6. 2.2 9km N of Yucca Valley, CA
  7. 1.6 7km ESE of Yucaipa, CA
  8. 1.8 2km SW of Loma Linda, CA
  9. 1.8 8km S of Redlands, CA
  10. 1.9 7km NE of Banning, CA
  11. 2.1 7km SE of Yucca Valley, CA
  12. 2.4 6km SSW of Big Bear City, CA
  13. 1.8 1km ESE of Loma Linda, CA
  14. 1.6 11km ENE of Desert Hot Springs, CA
  15. 1.6 5km SE 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 2016-01-06 — it released about 5,100 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.