QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

14km SSE of Big Bear Lake, CA

· 8.5 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 90 kmSan Bernardino County 100 kmOrange County 101 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
8.5 km below the surface
Felt
no reports yet
Nearest
Riverside County, 90 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2644 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× 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 34.1372, -116.8393. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 90 km (56 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 100 km (62 mi) SW of here earthquakes near San Bernardino County
Orange County, CA 101 km (63 mi) ENE of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 1.9 2km E of Colton, CA
  2. 1.8 4km S of Idyllwild, CA
  3. 1.6 7km ENE of Cabazon, CA
  4. 1.5 7km ENE of Yucaipa, CA
  5. 1.8 6km N of Beaumont, CA
  6. 1.5 9km N of Big Bear City, CA
  7. 1.6 6km S of Big Bear City, CA
  8. 1.6 4km SSW of Idyllwild, CA
  9. 1.5 1km SSE of Loma Linda, CA
  10. 1.6 1km ESE of Loma Linda, CA
  11. 1.6 4km ESE of Loma Linda, CA
  12. 1.7 6km SSE of Loma Linda, CA
  13. 2.2 4km E of Yucca Valley, CA
  14. 1.9 5km NNE of Cabazon, CA
  15. 1.7 4km WSW of Morongo 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 14,000 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.