QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Twentynine Palms, CA

No earthquake was likely felt in Twentynine Palms in the 24 hours to 1:20 am PST (09:20 UTC). The last one was M 3.2, 30 km (19 mi) SW, at 9:51 am PDT on 1 August 2026, estimated intensity II (weak) in town; 46 felt reports to USGS. Every earthquake near Twentynine Palms

This page: a magnitude 2.7 earthquake was recorded 44 km (27 mi) north-northwest of Twentynine Palms, CA, at 2:15 pm PDT on 17 June 2023 (21:15 UTC), 2.0 km deep. 1 person has reported feeling it to USGS.

USGS: 26km SSW of Ludlow, CA

2:15 pm PDT, Jun 17, 2023 · · 2.0 km deep · released about 320 lb of TNT

Every earthquake near Twentynine Palms Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 40 kmRiverside County 88 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
2:15 pm PDT on 17 June 2023 ()
Where
44 km (27 mi) north-northwest of Twentynine Palms, CA · earthquakes near Twentynine Palms
Magnitude
M 2.7 (ml)
Depth
2.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Bernardino County, 40 km N
Nearest mapped fault
Lavic Lake fault, 2 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1180 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 25 km (16 mi) from the epicentre. In Twentynine Palms, 44 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 320 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.3 on 2016-02-20 — about 280 times the energy of this one.

Before 2016, the USGS record lists 22 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.3 The 1992 Landers, California Earthquake · 38 km SSW of this epicentre
  2. 7.1 The 1999 Hector Mine, California Earthquake · 12 km NNW of this epicentre
  3. 5.8 3km NE of Yucca Valley, California · 44 km SSW of this epicentre
  4. 5.8 13km WSW of Ludlow, CA · 21 km NNW of this epicentre
  5. 5.7 2km SSW of Joshua Tree, California · 43 km SSW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 34.4990, -116.2313. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Bernardino County, CA 40 km (25 mi) N earthquakes near San Bernardino County
Riverside County, CA 88 km (55 mi) SSE earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.7 13 km WSW of Ludlow, CA
  2. 1.9 13 km NW of Ludlow, CA
  3. 1.7 29 km N of Yucca Valley, CA
  4. 1.6 32 km N of Yucca Valley, CA
  5. 1.8 20 km NE of Big Bear City, CA
  6. 2.6 14 km WSW of Ludlow, CA
  7. 1.7 19 km SW of Ludlow, CA
  8. 1.6 39 km NE of Big Bear City, CA
  9. 1.7 37 km N of Yucca Valley, CA
  10. 1.7 22 km WNW of Ludlow, CA
  11. 2.1 15 km WSW of Ludlow, CA
  12. 1.9 19 km SW of Ludlow, CA
  13. 2.2 12 km NW of Twentynine Palms, CA
  14. 2.2 25 km NNW of Twentynine Palms, CA
  15. 1.8 17 km WSW of Ludlow, 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.