QuakeIndex

Earthquake · reviewed by a seismologist

M 4.4mw

1km SE of Delta, B.C., MX

· 29 km deep · released about 62 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 79 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 4.4 (mw)
Depth
29 km below the surface
Felt
101 reports · strongest reported intensity III
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Imperial County, 79 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2857 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 101 people have reported feeling it to USGS.

How big was it?

This earthquake released about 62 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,700× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 120× the energy of this one
  3. Magna, Utah 2020 M 5.7 86× the energy of this one
  4. This earthquake M 4.4 about 62 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 130× 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 32.3477, -115.1840. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Imperial County, CA 79 km (49 mi) SSE of here earthquakes near Imperial County
Yuma County, AZ 128 km (80 mi) WSW of here earthquakes near Yuma County

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

Aftershocks so far

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

  1. 1.8 5km S of Mexicali, B.C., MX
  2. 2.3 3km N of Guadalupe Victoria, B.C., MX
  3. 2.9 18km S of Alberto Oviedo Mota, B.C., MX
  4. 2.4 7km W of Alberto Oviedo Mota, B.C., MX
  5. 2.1 10km W of Alberto Oviedo Mota, B.C., MX
  6. 2.4 8km W of Alberto Oviedo Mota, B.C., MX
  7. 2.4 4km WSW of Alberto Oviedo Mota, B.C., MX
  8. 2.5 6km W of Alberto Oviedo Mota, B.C., MX
  9. 1.7 10km S of Progreso, B.C., MX
  10. 2.5 6km W of Alberto Oviedo Mota, B.C., MX
  11. 2.5 7km W of Alberto Oviedo Mota, B.C., MX
  12. 2.8 6km W of Alberto Oviedo Mota, B.C., MX
  13. 1.6 11km S of Progreso, B.C., MX
  14. 2.4 8km WSW of Alberto Oviedo Mota, B.C., MX
  15. 2.6 10km S 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.