Earthquake · reviewed by a seismologist
M 2.4ml
6km ENE of Puebla, B.C., MX
Yes. A magnitude 2.4 earthquake was recorded 6km ENE of Puebla, B.C., MX, 73 km (45 mi) W of Yuma, AZ, at 1:23 am PST on 4 December 2021 (09:23 UTC), 23 km deep.
73 km (45 mi) W of Yuma, AZ
- When
- Magnitude
- M 2.4 (ml)
- Depth
- 23 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 50 km N
- Nearest mapped fault
- Imperial fault, 24 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1802 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. 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.
Earthquakes near other towns within 30 km: Calexico, Holtville, Heber.
How big was it?
This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 95,000× the energy of this one
- Around the size people start to feel M 3.0 8.5× the energy of this one
- This earthquake M 2.4 about 110 lb of TNT
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 4,600 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 32.5905, -115.2965. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 50 km (31 mi) | N | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.6 15km WNW of Progreso, B.C., MX
- 1.6 6km S of Brawley, CA
- 1.9 6km S of Brawley, CA
- 1.6 7km S of Brawley, CA
- 1.6 7km S of Brawley, CA
- 2.6 6km S of Brawley, CA
- 2.2 6km S of Brawley, CA
- 1.6 6km S of Brawley, CA
- 2.0 2km NNW of El Centro, CA
- 1.9 7km ESE of Puebla, B.C., MX
- 1.8 18km WSW of Delta, B.C., MX
- 1.8 7km SW of Holtville, CA
- 1.6 8km SSW of Holtville, CA
- 1.5 8km NE of Mexicali, B.C., MX
- 2.0 7km NW 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
- 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.