QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

9km N of Cabazon, CA

· 9.1 km deep · released about 5.9 lb of TNT

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10 km30 km60 km120 km N Riverside County 79 kmOrange County 98 kmSan Diego County 108 kmSan Bernardino County 111 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 1.5 (ml)
Depth
9.1 km below the surface
Felt
no reports yet
Nearest
Riverside County, 79 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1895 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 33.9985, -116.7957. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 79 km (49 mi) WNW of here earthquakes near Riverside County
Orange County, CA 98 km (61 mi) ENE of here earthquakes near Orange County
San Diego County, CA 108 km (67 mi) N of here earthquakes near San Diego County
San Bernardino County, CA 111 km (69 mi) SSW 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

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

  1. 1.6 4km S of Lucerne Valley, CA
  2. 1.6 3km SSE of Yucca Valley, CA
  3. 1.6 7km ENE of Cabazon, CA
  4. 2.6 5km SE of Loma Linda, CA
  5. 1.8 4km NE of Beaumont, CA
  6. 2.4 10km SSW of Idyllwild, CA
  7. 1.8 14km WNW of Anza, CA
  8. 2.0 3km ESE of Yucca Valley, CA
  9. 1.7 4km SE of Yucaipa, CA
  10. 1.6 4km SW of Highland, CA
  11. 1.8 14km WNW of Anza, CA
  12. 1.9 14km WNW of Anza, CA
  13. 1.6 4km WNW of Idyllwild, CA
  14. 1.9 7km NW of Big Bear City, CA
  15. 1.6 7km NW 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 28,000 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.