QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Campo, CA

No earthquake was likely felt in Campo in the 24 hours to 7:42 am PST (15:42 UTC). The last one was M 4.9, 122 km (76 mi) E, at 10:27 am PST on 3 November 2026, estimated intensity II (weak) in town; 321 felt reports to USGS. Every earthquake near Campo

This page: a magnitude 2.1 earthquake was recorded 38 km (24 mi) south-southeast of Campo, CA, at 10:14 pm PST on 4 December 2023 (06:14 UTC), 17 km deep.

USGS: 38 km SSE of Campo, CA

94 km (59 mi) SE of San Diego, CA

10:14 pm PST, Dec 4, 2023 · · 17 km deep · released about 46 lb of TNT

Every earthquake near Campo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 92 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
10:14 pm PST on 4 December 2023 ()
Where
38 km (24 mi) south-southeast of Campo, CA · earthquakes near Campo
Magnitude
M 2.1 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
San Diego County, 92 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1073 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 2 km (1 mi) from the epicentre. In Campo, 38 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 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 4.2 on 2018-07-25 — about 1,300 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 6.1 30km ENE of Ensenada, B.C., MX · 38 km S of this epicentre
  2. 5.7 19km ESE of Primo Tapia, B.C., MX · 41 km WSW of this epicentre
  3. 5.6 37km ENE of Ensenada, B.C., MX · 35 km SSE of this epicentre
  4. 5.4 62km SSW of Progreso, B.C., MX · 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 32.2768, -116.3553. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Diego County, CA 92 km (57 mi) NNW earthquakes near San Diego County
Imperial County, CA 126 km (79 mi) NE earthquakes near Imperial County

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

Aftershocks so far

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

  1. 3.1 39 km E of Ensenada, B.C., MX
  2. 2.1 41 km E of Ensenada, B.C., MX
  3. 2.4 40 km E of Ensenada, B.C., MX
  4. 1.7 5 km ENE of Ensenada, B.C., MX
  5. 2.0 7 km ENE of Ensenada, B.C., MX
  6. 2.3 7 km ENE of Ensenada, B.C., MX
  7. 2.2 5 km ENE of Ensenada, B.C., MX
  8. 2.2 5 km ENE of Ensenada, B.C., MX
  9. 2.3 42 km ENE of Ensenada, B.C., MX
  10. 2.2 7 km ENE of Ensenada, B.C., MX
  11. 2.3 41 km E of Ensenada, B.C., MX
  12. 3.1 40 km E of Ensenada, B.C., MX
  13. 1.9 7 km NE of Ensenada, B.C., MX
  14. 1.8 37 km ENE of Ensenada, B.C., MX
  15. 2.0 28 km ESE of Campo, 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.