QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

4km SW of Adelanto, CA

· 9.1 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 85 kmOrange County 103 kmSan Bernardino County 120 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
9.1 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 85 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2749 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 13 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 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 34.5552, -117.4405. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 85 km (53 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 120 km (74 mi) WSW of here earthquakes near San Bernardino County
Kern County, CA 147 km (91 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. 1.6 3km W of San Bernardino, CA
  2. 1.6 3 km W of San Bernardino, CA
  3. 1.5 3km WSW of San Bernardino, CA
  4. 1.9 11km NW of Big Bear Lake, CA
  5. 1.6 1km ENE of Wrightwood, CA
  6. 2.9 10km NNE of Phelan, CA
  7. 1.6 11km NNE of Running Springs, CA
  8. 2.1 5km SSE of Lytle Creek, CA
  9. 1.7 5km SSW of Devore, CA
  10. 2.0 4km SSW of Lytle Creek, CA
  11. 2.0 3km SSE of Devore, CA
  12. 1.9 8km SSW of Lytle Creek, CA
  13. 1.5 10km NNW of Rancho Cucamonga, CA
  14. 1.7 17km ESE of Boron, CA
  15. 2.2 17km ESE of Boron, 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.