QuakeIndex

quarry blast · reviewed by a seismologist

M 1.7ml

11km ENE of Adelanto, CA

· -0.9 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 100 kmSan Bernardino County 106 kmOrange County 115 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 1.7 (ml)
Depth
-0.9 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 100 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2644 days ago

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

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 34.6350, -117.3068. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 100 km (62 mi) ENE of here earthquakes near Los Angeles County
San Bernardino County, CA 106 km (66 mi) WSW of here earthquakes near San Bernardino County
Orange County, CA 115 km (72 mi) NNE of here earthquakes near Orange County
Riverside County, CA 157 km (97 mi) NW of here earthquakes near Riverside County

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

Aftershocks so far

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

  1. 2.5 10km E of Barstow, CA
  2. 1.9 11km NW of Big Bear Lake, CA
  3. 1.6 1km ENE of Wrightwood, CA
  4. 1.7 11km SE of Lucerne Valley, CA
  5. 2.9 10km NNE of Phelan, CA
  6. 2.0 18km ENE of Boron, CA
  7. 1.6 11km NNE of Running Springs, CA
  8. 2.1 5km SSE of Lytle Creek, CA
  9. 2.2 18km ENE of Boron, CA
  10. 2.0 4km SSW of Lytle Creek, CA
  11. 2.0 3km SSE of Devore, CA
  12. 1.7 17km ESE of Boron, CA
  13. 2.2 17km ESE of Boron, CA
  14. 1.7 14km E of Boron, CA
  15. 2.2 7km ENE of Llano, 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.