QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

8km NW of Delta, B.C., MX

· 6.4 km deep · released about 1.2 tons of TNT

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10 km30 km60 km120 km N Imperial County 72 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 3.3 (ml)
Depth
6.4 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Imperial County, 72 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3371 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× 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.

Where

Epicentre 32.3978, -115.2602. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Imperial County, CA 72 km (45 mi) S of here earthquakes near Imperial County

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

Aftershocks so far

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

  1. 1.7 8km SW of Holtville, CA
  2. 2.2 17km W of Delta, B.C., MX
  3. 2.0 8km SSW of Progreso, B.C., MX
  4. 1.9 4km WSW of Progreso, B.C., MX
  5. 2.2 7km WNW of Alberto Oviedo Mota, B.C., MX
  6. 2.1 2km ESE of Delta, B.C., MX
  7. 1.6 9km S of Progreso, B.C., MX
  8. 1.5 13km W of Progreso, B.C., MX
  9. 1.5 9km NE of Mexicali, B.C., MX
  10. 3.0 1km SW of Delta, B.C., MX
  11. 1.8 8km SSW of Holtville, CA
  12. 2.2 8km ENE of Calexico, CA
  13. 2.9 7km NNW of Delta, B.C., MX
  14. 1.8 4km NE of Progreso, B.C., MX
  15. 2.1 17km SSE of Progreso, B.C., MX

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.