QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

22km S of Twentynine Palms, CA

· 3.1 km deep · released about 24 lb of TNT

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10 km30 km60 km120 km N Riverside County 24 kmSan Bernardino County 103 kmImperial 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
3.1 km below the surface
Felt
no reports yet
Nearest
Riverside County, 24 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3733 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 24 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 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 33.9417, -116.0300. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 24 km (15 mi) N of here earthquakes near Riverside County
San Bernardino County, CA 103 km (64 mi) S of here earthquakes near San Bernardino County
Imperial County, CA 118 km (73 mi) NNW of here earthquakes near Imperial County
San Diego County, CA 123 km (77 mi) NE 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

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

  1. 2.8 11km NE of Indio, CA
  2. 2.4 11km NE of Indio, CA
  3. 1.9 16km S of Joshua Tree, CA
  4. 2.4 16km S of Joshua Tree, CA
  5. 1.7 10km NNE of Indio, CA
  6. 1.9 25km NNW of Twentynine Palms, CA
  7. 1.7 13km S of Joshua Tree, CA
  8. 2.2 16km ENE of Coachella, CA
  9. 1.6 10km NE of Indio, CA
  10. 1.9 2km NW of Desert Hot Springs, CA
  11. 2.5 2km NW of Desert Hot Springs, CA
  12. 1.6 15km NE of Thermal, CA
  13. 1.8 14km ENE of Thousand Palms, CA
  14. 1.6 14km ENE of Thousand Palms, CA
  15. 1.9 10km SSW of Joshua Tree, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.