QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

11km SSE of Twentynine Palms, CA

· 8.0 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 36 kmSan Bernardino County 91 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
8.0 km below the surface
Felt
no reports yet
Nearest
Riverside County, 36 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2837 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 6.2 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 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 34.0505, -116.0217. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 36 km (22 mi) N of here earthquakes near Riverside County
San Bernardino County, CA 91 km (56 mi) S of here earthquakes near San Bernardino County
Imperial County, CA 128 km (80 mi) NNW of here earthquakes near Imperial County
San Diego County, CA 134 km (83 mi) NNE 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

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

  1. 1.9 8km SSE of Yucca Valley, CA
  2. 1.5 8km SSE of Yucca Valley, CA
  3. 2.4 33km SE of Twentynine Palms, CA
  4. 1.9 12km NE of Indio, CA
  5. 1.8 16km NE of Indio, CA
  6. 1.7 16km S of Twentynine Palms, CA
  7. 2.3 5km NNE of Yucca Valley, CA
  8. 1.6 12km NNE of Thousand Palms, CA
  9. 2.3 15km S of Twentynine Palms, CA
  10. 2.2 16km S of Twentynine Palms, CA
  11. 2.0 16km NE of Coachella, CA
  12. 1.9 14km NE of Thousand Palms, CA
  13. 1.6 16km S of Twentynine Palms, CA
  14. 1.6 16km S of Twentynine Palms, CA
  15. 1.5 19km ENE of Thousand Palms, 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.