QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

13km NNE of Yucaipa, CA

· 6.3 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 89 kmRiverside County 102 kmSan Bernardino County 109 kmLos Angeles County 117 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
6.3 km below the surface
Felt
no reports yet
Nearest
Orange County, 89 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3233 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 12 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 34.1422, -116.9885. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 89 km (56 mi) NE of here earthquakes near Orange County
Riverside County, CA 102 km (63 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 109 km (67 mi) SW of here earthquakes near San Bernardino County
Los Angeles County, CA 117 km (73 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

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

  1. 1.5 3km WSW of Big Bear City, CA
  2. 1.5 6km NW of Highland, CA
  3. 1.8 10km NNE of Running Springs, CA
  4. 1.6 5km S of Redlands, CA
  5. 2.8 5km S of Redlands, CA
  6. 2.0 5km SE of Cabazon, CA
  7. 1.5 12km NNE of Cabazon, CA
  8. 2.6 6km WNW of Desert Hot Springs, CA
  9. 2.0 4km SW of Redlands, CA
  10. 1.8 18km ENE of Big Bear City, CA
  11. 1.5 3km ENE of Rialto, CA
  12. 1.5 6km N of Big Bear City, CA
  13. 3.2 6km N of Big Bear City, CA
  14. 1.6 4km WNW of Muscoy, CA
  15. 1.7 4km S 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 9,400 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.