QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

10km NE of Running Springs, CA

· 1.9 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 95 kmSan Bernardino County 102 kmRiverside County 112 kmLos Angeles County 114 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 2.5 (ml)
Depth
1.9 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Orange County, 95 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1512 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 95,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 68,000× the energy of this one
  3. Around the size people start to feel M 3.0 6× the energy of this one
  4. This earthquake M 2.5 about 160 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 34.2692, -117.0300. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 95 km (59 mi) NE of here earthquakes near Orange County
San Bernardino County, CA 102 km (63 mi) SW of here earthquakes near San Bernardino County
Riverside County, CA 112 km (70 mi) WNW of here earthquakes near Riverside County
Los Angeles County, CA 114 km (71 mi) E of here earthquakes near Los Angeles 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. 2.6 3km SE of Loma Linda, CA
  2. 1.6 3km ESE of Loma Linda, CA
  3. 2.7 5km E of Calimesa, CA
  4. 2.7 2km ESE of Loma Linda, CA
  5. 1.5 5km ENE of Rancho Cucamonga, CA
  6. 1.5 3km ESE of Loma Linda, CA
  7. 2.5 10km N of Lytle Creek, CA
  8. 2.3 1km NNW of Colton, CA
  9. 1.5 6km N of Big Bear City, CA
  10. 2.2 4km SE of Yucaipa, CA
  11. 1.7 14km SW of Lucerne Valley, CA
  12. 1.7 6km SSE of Beaumont, CA
  13. 1.7 2km SSE of Muscoy, CA
  14. 1.6 2km ESE of Loma Linda, CA
  15. 2.1 2km NNE 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 2016-01-06 — it released about 730 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.