QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

7km NW of Delta, B.C., MX

Yes. A magnitude 3.1 earthquake was recorded 7km NW of Delta, B.C., MX, 69 km (43 mi) W of Yuma, AZ, at 11:12 pm PDT on 23 July 2022 (06:12 UTC), 11 km deep. 1 person has reported feeling it to USGS.

69 km (43 mi) W of Yuma, AZ

· 11 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
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 3.1 (ml)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Imperial County, 72 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1503 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 40 km (25 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 39 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 4.8 on 2018-11-19 — about 390 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 32.3990, -115.2408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Imperial County, CA 72 km (45 mi) N earthquakes near Imperial 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. 1.6 7km WSW of Holtville, CA
  2. 2.1 1km SW of Delta, B.C., MX
  3. 1.9 12km W of Delta, B.C., MX
  4. 1.5 10km W of Progreso, B.C., MX
  5. 2.1 4km WNW of Delta, B.C., MX
  6. 1.6 8km WSW of Progreso, B.C., MX
  7. 1.6 7km E of Puebla, B.C., MX
  8. 1.9 8km ESE of Puebla, B.C., MX
  9. 1.6 8km SW of Holtville, CA
  10. 2.4 8km WNW of Alberto Oviedo Mota, B.C., MX
  11. 1.6 4km E of Puebla, B.C., MX
  12. 2.1 14km W of Delta, B.C., MX
  13. 3.6 5km WSW of Delta, B.C., MX
  14. 2.2 4km ENE of Delta, B.C., MX
  15. 2.6 10km SSE of Puebla, 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.