QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

Earthquake near El Centro, CA

No earthquake was likely felt in El Centro in the 24 hours to 12:13 pm PST (20:13 UTC). The last one was M 4.9, 54 km (33 mi) SE, at 10:27 am PST on 3 November 2026, estimated intensity III (weak) in town; 321 felt reports to USGS. Every earthquake near El Centro

This page: a magnitude 3.4 earthquake was recorded 49 km (31 mi) west-northwest of El Centro, CA, at 10:55 pm PDT on 29 April 2023 (05:55 UTC), 7.7 km deep. 2 people have reported feeling it to USGS.

USGS: 17km SE of Ocotillo Wells, CA

10:55 pm PDT, Apr 29, 2023 · · 7.7 km deep · released about 1.7 tons of TNT

Every earthquake near El Centro Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 61 kmSan Diego County 72 kmRiverside County 78 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
10:55 pm PDT on 29 April 2023 ()
Where
49 km (31 mi) west-northwest of El Centro, CA · earthquakes near El Centro
Magnitude
M 3.4 (ml)
Depth
7.7 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Imperial County, 61 km E
Nearest mapped fault
San Jacinto fault, 4 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 1216 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 55 km (34 mi) from the epicentre. In El Centro, 49 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.

Likely felt in: Salton City 30 km, intensity II · Borrego Springs 42 km, intensity II · Brawley 45 km, intensity II · Imperial 46 km, intensity II · Calipatria 47 km, intensity II · El Centro 49 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 99,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,100× the energy of this one
  4. This earthquake M 3.4 about 1.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.6× more

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 5.3 on 2021-06-05 — about 660 times the energy of this one.

Before 2016, the USGS record lists 31 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1942 Fish Creek Mountains, California Earthquake · 22 km ESE of this epicentre
  2. 6.6 The 1968 Borrego Mountain, California Earthquake · 19 km NNW of this epicentre
  3. 6.6 The 1987 Superstition Hills, California Earthquake · 15 km E of this epicentre
  4. 6.4 The 1954 San Jacinto Fault, California Earthquake · 31 km NNW of this epicentre
  5. 6.3 The 1906 Imperial Valley, California Earthquake · 50 km ESE 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 33.0297, -116.0077. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Imperial County, CA 61 km (38 mi) E earthquakes near Imperial County
San Diego County, CA 72 km (45 mi) W earthquakes near San Diego County
Riverside County, CA 78 km (48 mi) N earthquakes near Riverside County

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

Aftershocks so far

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

  1. 2.5 18km SE of Ocotillo Wells, CA
  2. 3.1 17km SE of Ocotillo Wells, CA
  3. 1.8 20km ESE of Ocotillo, CA
  4. 2.6 17km SE of Ocotillo Wells, CA
  5. 1.8 9km SW of Niland, CA
  6. 1.6 14km WSW of Niland, CA
  7. 1.5 8km WSW of Niland, CA
  8. 3.2 8km WSW of Niland, CA
  9. 2.4 8km WSW of Niland, CA
  10. 1.7 8km SW of Niland, CA
  11. 1.6 9km SW of Niland, CA
  12. 1.5 6km WSW of Niland, CA
  13. 1.6 7km WSW of Niland, CA
  14. 1.7 9km WSW of Niland, CA
  15. 1.6 8km SW of Niland, 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.