QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

12 km WSW of Morongo Valley, CA

· 16 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 73 kmSan Bernardino County 105 kmOrange County 106 kmSan Diego 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
16 km below the surface
Felt
no reports yet
Nearest
Riverside County, 73 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 609 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 5.7 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 2,600,000× 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 5.7 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 34.0232, -116.7135. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 73 km (46 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 105 km (65 mi) SSW of here earthquakes near San Bernardino County
Orange County, CA 106 km (66 mi) ENE of here earthquakes near Orange County
San Diego County, CA 111 km (69 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

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

  1. 1.9 9 km SSW of Morongo Valley, CA
  2. 1.7 7 km S of Big Bear City, CA
  3. 2.4 28 km N of Yucca Valley, CA
  4. 1.8 11 km SSE of Hemet, CA
  5. 1.7 4 km ENE of Moreno Valley, CA
  6. 2.4 10 km ENE of Lake Arrowhead, CA
  7. 1.9 10 km ENE of Lake Arrowhead, CA
  8. 1.7 12 km SW of Big Bear Lake, CA
  9. 1.8 3 km NNE of Moreno Valley, CA
  10. 2.0 7 km NNW of Idyllwild, CA
  11. 1.8 3 km SE of Loma Linda, CA
  12. 1.5 8 km NNE of Banning, CA
  13. 1.9 8 km NE of Moreno Valley, CA
  14. 1.7 1 km ENE of Loma Linda, CA
  15. 1.6 5 km SSE of Yucca 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 29,000 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.