QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

13km WNW of Morongo Valley, CA

· 10 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 77 kmSan Bernardino County 99 kmOrange County 108 kmSan Diego County 118 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 1.9 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Riverside County, 77 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3741 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 34.0833, -116.7153. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 77 km (48 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 99 km (61 mi) SSW of here earthquakes near San Bernardino County
Orange County, CA 108 km (67 mi) ENE of here earthquakes near Orange County
San Diego County, CA 118 km (73 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

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

  1. 1.6 12km SSE of Big Bear City, CA
  2. 1.6 13km W of Morongo Valley, CA
  3. 1.6 4km N of Big Bear City, CA
  4. 1.6 10km NE of Cabazon, CA
  5. 3.3 10km NE of Cabazon, CA
  6. 1.6 14km S of Big Bear Lake, CA
  7. 1.6 5km NE of Cabazon, CA
  8. 2.2 5km NW of Big Bear City, CA
  9. 1.9 12km NW of Big Bear Lake, CA
  10. 1.5 9km N of Big Bear City, CA
  11. 2.0 39km NE of Big Bear City, CA
  12. 2.1 39km NE of Big Bear City, CA
  13. 2.7 10km S of Idyllwild, CA
  14. 1.8 9km N of Banning, CA
  15. 1.6 8km NE of Nuevo, 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 5,400 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.