QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

15km ENE of Yucaipa, CA

· 7.1 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 89 kmOrange County 93 kmSan Bernardino County 109 kmSan Diego 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 1.7 (ml)
Depth
7.1 km below the surface
Felt
no reports yet
Nearest
Riverside County, 89 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1328 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 34.0662, -116.8830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 89 km (56 mi) WNW of here earthquakes near Riverside County
Orange County, CA 93 km (58 mi) ENE of here earthquakes near Orange County
San Bernardino County, CA 109 km (68 mi) SW of here earthquakes near San Bernardino County
San Diego County, CA 116 km (72 mi) N of here earthquakes near San Diego County

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

Aftershocks so far

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

  1. 1.5 4km E of Big Bear City, CA
  2. 1.7 8km SW of Calimesa, CA
  3. 1.6 8km S of Redlands, CA
  4. 1.7 6km SE of Beaumont, CA
  5. 1.6 9km NNE of Banning, CA
  6. 1.6 4km S of Banning, CA
  7. 1.7 5km SSW of Redlands, CA
  8. 1.6 2km E of Loma Linda, CA
  9. 1.6 1km W of Cabazon, CA
  10. 1.6 8km SE of Valle Vista, CA
  11. 1.7 9km SE of Valle Vista, CA
  12. 1.6 6km SE of Loma Linda, CA
  13. 1.8 9km N of Idyllwild, CA
  14. 2.0 5km NNE of Banning, CA
  15. 1.5 10km SSW of Joshua Tree, 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 18,000 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.