QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

6km NNE of San Bernardino, CA

· 3.2 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 73 kmLos Angeles County 92 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
3.2 km below the surface
Felt
29 reports · strongest reported intensity IV
Nearest
Orange County, 73 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1781 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 29 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 34.1753, -117.2600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 73 km (46 mi) NE of here earthquakes near Orange County
Los Angeles County, CA 92 km (57 mi) E of here earthquakes near Los Angeles County
San Bernardino County, CA 125 km (77 mi) SW of here earthquakes near San Bernardino County
Riverside County, CA 126 km (78 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. 1.7 4km WNW of Banning, CA
  2. 1.7 3km NNW of Mira Loma, CA
  3. 1.9 9km NNE of Banning, CA
  4. 1.7 5km SSW of Devore, CA
  5. 1.5 6km N of Moreno Valley, CA
  6. 2.2 6km SSE of Mentone, CA
  7. 1.5 6km NNW of Glen Avon, CA
  8. 2.0 8km S of Big Bear Lake, CA
  9. 2.0 4km SSW of Lytle Creek, CA
  10. 2.0 8km NNE of Banning, CA
  11. 1.9 1km E of Redlands, CA
  12. 2.4 3km S of Loma Linda, CA
  13. 1.7 1km ENE of Redlands, CA
  14. 2.0 5km S of Redlands, CA
  15. 1.6 9km N of Big Bear City, 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 4.5 on 2018-05-08 — it released about 1,000 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.