QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

1km ENE of Wrightwood, CA

· 11 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 62 kmOrange County 78 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 1.6 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 62 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2543 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 34.3647, -117.6217. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 62 km (38 mi) ENE of here earthquakes near Los Angeles County
Orange County, CA 78 km (48 mi) N of here earthquakes near Orange County
Kern County, CA 149 km (92 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

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

  1. 1.5 5km ESE of Ontario, CA
  2. 1.8 4km NNE of Lytle Creek, CA
  3. 1.6 5km SW of Fontana, CA
  4. 2.0 1km SSE of Colton, CA
  5. 1.7 2km SSE of Wrightwood, CA
  6. 1.7 3km NW of Fontana, CA
  7. 1.9 3km NNW of Fontana, CA
  8. 2.0 7km NNE of Fontana, CA
  9. 2.4 3km NNE of Wrightwood, CA
  10. 2.9 3km NNE of Wrightwood, CA
  11. 2.4 2km ENE of Colton, CA
  12. 1.7 2km NE of Colton, CA
  13. 1.6 3km WNW of Loma Linda, CA
  14. 1.7 3km WNW of Loma Linda, CA
  15. 1.6 1km NNW 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 2018-08-29 — it released about 15,000 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.