QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8km ESE of Wrightwood, CA

· 8.9 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 66 kmOrange County 76 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
8.9 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 66 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.

How big was it?

This earthquake released about 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 34.3330, -117.5590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 66 km (41 mi) ENE of here earthquakes near Los Angeles County
Orange County, CA 76 km (47 mi) NNE of here earthquakes near Orange County
Kern County, CA 155 km (96 mi) SE of here earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.7 1km NNW of Loma Linda, CA
  2. 2.2 2km ESE of Loma Linda, CA
  3. 2.5 6km SW of Lytle Creek, CA
  4. 2.0 4km WNW of Muscoy, CA
  5. 1.7 6km NNW of Fontana, CA
  6. 2.0 5km ENE of Ontario, CA
  7. 2.2 5km SE of Loma Linda, CA
  8. 1.7 8km S of Hesperia, CA
  9. 1.7 7km N of Running Springs, CA
  10. 1.7 10km SSW of Lucerne Valley, CA
  11. 2.1 1km WNW of Pomona, CA
  12. 2.8 4km SE of Loma Linda, CA
  13. 1.8 3km NNW of Loma Linda, CA
  14. 1.6 6km NNW of Fontana, CA
  15. 1.5 1km W 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.

On USGS

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