QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

5km NNW of Mountain View Acres, CA

· 7.8 km deep · released about 54 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 90 kmOrange County 103 kmSan Bernardino County 114 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 2.2 (ml)
Depth
7.8 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Los Angeles County, 90 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2984 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 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 34.5398, -117.3730. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 90 km (56 mi) ENE of here earthquakes near Los Angeles County
Orange County, CA 103 km (64 mi) NNE of here earthquakes near Orange County
San Bernardino County, CA 114 km (71 mi) WSW of here earthquakes near San Bernardino County

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

Aftershocks so far

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

  1. 3.2 6km NNW of Big Bear Lake, CA
  2. 2.8 3km NW of Fontana, CA
  3. 2.4 3km NNE of Rancho Cucamonga, CA
  4. 1.5 17km NNE of Glendora, CA
  5. 1.5 17km NNE of Glendora, CA
  6. 1.7 6km NW of Highland, CA
  7. 2.0 6km NW of Highland, CA
  8. 2.1 2km SSE of Devore, CA
  9. 2.1 10km NNW of Big Bear Lake, CA
  10. 1.6 10km NNW of Big Bear Lake, CA
  11. 1.9 9km WSW of Wrightwood, CA
  12. 2.5 6km NNW of Big Bear Lake, CA
  13. 1.6 10km NNW of Big Bear Lake, CA
  14. 1.7 10km N of Big Bear Lake, CA
  15. 2.5 6km SW of Lytle Creek, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.