QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

6km NW of Calimesa, CA

· 17 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 73 kmRiverside County 107 kmLos Angeles County 109 kmSan Diego County 115 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
17 km below the surface
Felt
no reports yet
Nearest
Orange County, 73 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2340 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 5.6 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 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 34.0190, -117.1027. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 73 km (45 mi) ENE of here earthquakes near Orange County
Riverside County, CA 107 km (66 mi) WNW of here earthquakes near Riverside County
Los Angeles County, CA 109 km (67 mi) E of here earthquakes near Los Angeles County
San Diego County, CA 115 km (71 mi) NNW of here earthquakes near San Diego County
San Bernardino County, CA 126 km (78 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 6km SSW of Redlands, CA
  2. 1.9 6 km SSE of Home Gardens, CA
  3. 1.7 2km SSE of Loma Linda, CA
  4. 1.6 3km ESE of Home Gardens, CA
  5. 2.8 7km SSW of Cabazon, CA
  6. 2.5 4km WSW of Banning, CA
  7. 1.6 1km ESE of Redlands, CA
  8. 1.7 7km NNE of Fontana, CA
  9. 1.9 5km SSW of Idyllwild, CA
  10. 1.5 3km SSW of Running Springs, CA
  11. 2.4 5km NW of Big Bear City, CA
  12. 2.1 4km SW of Lytle Creek, CA
  13. 1.7 5km SW of Banning, CA
  14. 1.7 0km NW of Loma Linda, CA
  15. 1.5 2km S of Home Gardens, 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 30,000 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.