QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

6km NNE of Running Springs, CA

· 3.5 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 90 kmSan Bernardino County 107 kmLos Angeles County 108 kmRiverside County 116 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 1.5 (ml)
Depth
3.5 km below the surface
Felt
no reports yet
Nearest
Orange County, 90 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3258 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 34.2555, -117.0943. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 90 km (56 mi) NE of here earthquakes near Orange County
San Bernardino County, CA 107 km (67 mi) SW of here earthquakes near San Bernardino County
Los Angeles County, CA 108 km (67 mi) E of here earthquakes near Los Angeles County
Riverside County, CA 116 km (72 mi) WNW of here earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.6 15km NNE of Apple Valley, CA
  2. 1.6 7km NW of Banning, CA
  3. 1.6 7km NE of Beaumont, CA
  4. 3.0 7km NE of Beaumont, CA
  5. 1.6 1km SW of Colton, CA
  6. 2.5 10km NE of Running Springs, CA
  7. 2.1 9km NNW of Big Bear City, CA
  8. 1.6 2km SE of Redlands, CA
  9. 1.8 2km ENE of Colton, CA
  10. 1.8 4km NNE of Moreno Valley, CA
  11. 1.6 1km NNW of Loma Linda, CA
  12. 2.4 2km SE of Redlands, CA
  13. 1.5 2km SSE of Redlands, CA
  14. 1.5 2km SE of Redlands, CA
  15. 1.6 2km SE of Redlands, 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 2016-01-06 — it released about 19,000 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.