QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

25km NE of Thermal, CA

· 1.0 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 9 kmImperial County 96 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 1.8 (ml)
Depth
1.0 km below the surface
Felt
no reports yet
Nearest
Riverside County, 9 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3684 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 33.7633, -115.9180. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 9 km (5 mi) ENE of here earthquakes near Riverside County
Imperial County, CA 96 km (60 mi) NNW of here earthquakes near Imperial County
San Diego County, CA 115 km (71 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

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

  1. 2.0 20km NE of Coachella, CA
  2. 2.7 10km NE of Indio, CA
  3. 1.7 18km S of Joshua Tree, CA
  4. 1.6 16km NE of Coachella, CA
  5. 1.6 11km ENE of Desert Hot Springs, CA
  6. 2.1 17km ENE of Thousand Palms, CA
  7. 2.2 15km NE of Coachella, CA
  8. 2.2 11km NE of Indio, CA
  9. 1.6 10km NE of Indio, CA
  10. 1.5 12km NNE of Thousand Palms, CA
  11. 2.0 12km NNE of Thousand Palms, CA
  12. 2.8 11km NE of Indio, CA
  13. 2.4 11km NE of Indio, CA
  14. 1.9 16km S of Joshua Tree, CA
  15. 2.4 16km S 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.