QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0mw

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

Yes. A magnitude 4.0 earthquake was recorded 8 km NW of Delta, B.C., MX, 70 km (43 mi) W of Yuma, AZ, at 11:33 am PDT on 12 May 2024 (18:33 UTC), 11 km deep. 12 people have reported feeling it to USGS.

70 km (43 mi) W of Yuma, AZ

· 11 km deep · released about 15 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 71 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 4.0 (mw)
Depth
11 km below the surface
Felt
12 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Imperial County, 71 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 764 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 96 km (60 mi) from the epicentre. 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: Calexico 38 km, intensity III · Holtville 46 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 11,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 500× the energy of this one
  3. Magna, Utah 2020 M 5.7 350× the energy of this one
  4. This earthquake M 4.0 about 15 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 32× 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 in our catalogue was M 4.9 on 2024-05-12 — about 19 times the energy of this one.

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 32.4100, -115.2567. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Imperial County, CA 71 km (44 mi) N earthquakes near Imperial County

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

Aftershocks so far

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

  1. 2.8 13 km SSE of Progreso, B.C., MX
  2. 2.1 8 km NNW of Delta, B.C., MX
  3. 1.6 7 km NNW of Delta, B.C., MX
  4. 2.5 8 km NNW of Delta, B.C., MX
  5. 3.3 7 km NW of Delta, B.C., MX
  6. 1.9 6 km NW of Delta, B.C., MX
  7. 2.4 7 km NW of Delta, B.C., MX
  8. 2.4 7 km NNW of Delta, B.C., MX
  9. 2.2 8 km NW of Delta, B.C., MX
  10. 2.0 8 km NNW of Delta, B.C., MX
  11. 1.9 10 km NW of Delta, B.C., MX
  12. 2.8 10 km NNW of Delta, B.C., MX
  13. 1.9 10 km NNW of Delta, B.C., MX
  14. 2.0 9 km NNW of Delta, B.C., MX
  15. 1.6 10 km NNW of Delta, 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.