QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

16km NE of Thousand Palms, CA

· 9.3 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Riverside County 34 kmSan Bernardino County 104 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 1.9 (ml)
Depth
9.3 km below the surface
Felt
no reports yet
Nearest
Riverside County, 34 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1967 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 25 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 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 33.9285, -116.2783. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Riverside County, CA 34 km (21 mi) NW of here earthquakes near Riverside County
San Bernardino County, CA 104 km (64 mi) S of here earthquakes near San Bernardino County
San Diego County, CA 111 km (69 mi) NNE of here earthquakes near San Diego County
Imperial County, CA 131 km (81 mi) NW of here earthquakes near Imperial County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.5 9km N of Cabazon, CA
  2. 1.8 9km SSE of Cabazon, CA
  3. 2.1 3km SW of Morongo Valley, CA
  4. 1.9 27km NE of Indio, CA
  5. 1.5 26km NE of Indio, CA
  6. 2.7 27km NE of Indio, CA
  7. 2.4 27km NE of Indio, CA
  8. 1.7 21km ESE of Anza, CA
  9. 1.8 13km S of Twentynine Palms, CA
  10. 2.0 7km N of Yucca Valley, CA
  11. 1.6 27km NE of Indio, CA
  12. 1.8 27km NE of Indio, CA
  13. 1.7 23km ENE of Thermal, CA
  14. 1.6 23km ENE of Thermal, CA
  15. 1.6 7km SW of Morongo 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 6,700 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.