Earthquake · reviewed by a seismologist
M 4.0mw
6km NNW of Delta, B.C., MX
Yes. A magnitude 4.0 earthquake was recorded 6km NNW of Delta, B.C., MX, 67 km (42 mi) W of Yuma, AZ, at 1:44 am PDT on 30 August 2022 (08:44 UTC), 12 km deep. 3 people have reported feeling it to USGS.
67 km (42 mi) W of Yuma, AZ
- When
- Magnitude
- M 4.0 (mw)
- Depth
- 12 km below the surface
- Felt
- 3 reports · strongest reported intensity III
- Measured shaking
- intensity IV (ShakeMap)
- USGS impact alert
- green
- Nearest
- Imperial County, 72 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1467 days ago
Earthquake alerts for Calexico, CA
Get a notification in this browser when USGS records an earthquake near Calexico, CA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 98 km (61 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 40 km, intensity III · Holtville 47 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 17 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.
- Northridge, California 1994 M 6.7 10,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 450× the energy of this one
- Magna, Utah 2020 M 5.7 320× the energy of this one
- This earthquake M 4.0 about 17 tons of TNT
- Around the size people start to feel M 3.0 this one released 35× 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 15 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 32.4063, -115.2252. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 72 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
44 earthquakes have been recorded within 50 km since this one.
- 2.0 20km W of Delta, B.C., MX
- 1.7 8km W of Holtville, CA
- 2.1 4km NNW of Delta, B.C., MX
- 2.0 7km SW of Holtville, CA
- 2.2 7km NNE of Delta, B.C., MX
- 3.2 6km W of Alberto Oviedo Mota, B.C., MX
- 2.5 13km WSW of Delta, B.C., MX
- 2.0 10km ESE of Puebla, B.C., MX
- 2.1 11km NNW of Delta, B.C., MX
- 2.0 9km NW of Delta, B.C., MX
- 2.3 12km NW of Delta, B.C., MX
- 1.5 9km WSW of Progreso, B.C., MX
- 1.8 8km SW of Holtville, CA
- 1.6 8km SSW of Holtville, CA
- 2.4 9km W of Alberto Oviedo Mota, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.