QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

Earthquake near El Centro, CA

No earthquake was likely felt in El Centro in the 24 hours to 1:18 pm PST (21:18 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 2.3 earthquake was recorded 44 km (28 mi) west-southwest of El Centro, CA, at 3:55 am PDT on 9 July 2023 (10:55 UTC), 11 km deep. 1 person has reported feeling it to USGS.

USGS: 9km SSW of Ocotillo, CA

3:55 am PDT, Jul 9, 2023 · · 11 km deep · released about 94 lb of TNT

Every earthquake near El Centro Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 75 kmSan Diego County 82 kmRiverside County 119 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
3:55 am PDT on 9 July 2023 ()
Where
44 km (28 mi) west-southwest of El Centro, CA · earthquakes near El Centro
Magnitude
M 2.3 (ml)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Imperial County, 75 km NE
Nearest mapped fault
Elsinore fault, 10 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 1221 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. In El Centro, 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 94 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 160,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 94 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 4.5 on 2020-05-10 — about 2,100 times the energy of this one.

Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1942 Fish Creek Mountains, California Earthquake · 41 km NNE of this epicentre
  2. 6.6 The 1987 Superstition Hills, California Earthquake · 42 km NNE of this epicentre
  3. 5.7 8km ESE of Ocotillo, CA · 11 km ENE of this epicentre
  4. 5.3 15km SSW of Progreso, B.C., MX · 42 km ESE of this epicentre
  5. 5.2 21km NW of Ocotillo, CA · 27 km NNW 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 32.6595, -116.0117. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Imperial County, CA 75 km (46 mi) NE earthquakes near Imperial County
San Diego County, CA 82 km (51 mi) WNW earthquakes near San Diego County
Riverside County, CA 119 km (74 mi) N earthquakes near Riverside County

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

Aftershocks so far

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

  1. 1.7 1 km NNW of El Centro, CA
  2. 1.6 17 km ENE of Ocotillo, CA
  3. 1.7 4 km NNE of Heber, CA
  4. 1.8 17 km NW of Ocotillo, CA
  5. 1.8 19 km NW of Progreso, B.C., MX
  6. 1.7 3 km W of Heber, CA
  7. 1.7 3 km W of Heber, CA
  8. 1.9 18 km NW of Progreso, B.C., MX
  9. 1.9 26 km SSW of Ocotillo Wells, CA
  10. 2.0 14 km SSE of Progreso, B.C., MX
  11. 1.7 18 km WSW of Heber, CA
  12. 1.9 18 km WSW of El Centro, CA
  13. 1.7 4 km SW of Heber, CA
  14. 2.0 2 km W of Heber, CA
  15. 1.6 3 km SSW of Heber, 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.