QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

3km S of Redlands, CA

· 15 km deep · released about 200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 67 kmLos Angeles County 101 kmRiverside County 114 kmSan Diego County 118 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
15 km below the surface
Felt
16 reports · strongest reported intensity III
Nearest
Orange County, 67 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 712 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 16 people have reported feeling it to USGS.

How big was it?

This earthquake released about 200 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 75,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 53,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.7× the energy of this one
  4. This earthquake M 2.5 about 200 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 34.0250, -117.1818. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 67 km (42 mi) NE of here earthquakes near Orange County
Los Angeles County, CA 101 km (63 mi) E of here earthquakes near Los Angeles County
Riverside County, CA 114 km (71 mi) WNW of here earthquakes near Riverside County
San Diego County, CA 118 km (73 mi) NNW of here earthquakes near San Diego County
San Bernardino County, CA 130 km (81 mi) SW of here earthquakes near San Bernardino County

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

Aftershocks so far

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

  1. 1.7 3km SSE of Redlands, CA
  2. 1.7 7km NNE of Cabazon, CA
  3. 1.5 5km ESE of Yucaipa, CA
  4. 1.6 3km WNW of Loma Linda, CA
  5. 1.6 11km N of Big Bear Lake, CA
  6. 1.7 3km WNW of Loma Linda, CA
  7. 1.6 1km NNW of Loma Linda, CA
  8. 1.6 3km NNW of Bloomington, CA
  9. 1.6 7km E of Calimesa, CA
  10. 1.7 7km NE of Rancho Cucamonga, CA
  11. 2.2 2km S of Loma Linda, CA
  12. 2.4 3km E of Upland, CA
  13. 1.9 12km SW of Morongo Valley, CA
  14. 1.8 8 km NNE of Banning, CA
  15. 1.8 8km NE of Moreno Valley, 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 810 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.