Earthquake · reviewed by a seismologist
M 2.2ml
2km W of Delta, B.C., MX
Yes. A magnitude 2.2 earthquake was recorded 2km W of Delta, B.C., MX, 67 km (42 mi) WSW of Yuma, AZ, at 10:19 pm MST on 17 September 2021 (05:19 UTC), 17 km deep.
67 km (42 mi) WSW of Yuma, AZ
- When
- Magnitude
- M 2.2 (ml)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 77 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1880 days ago
Earthquake alerts for San Luis, AZ
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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, people at rest would likely notice it out to about 8 km (5 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.
How big was it?
This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
- Magna, Utah 2020 M 5.7 160,000× the energy of this one
- Around the size people start to feel M 3.0 14× the energy of this one
- This earthquake M 2.2 about 67 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 7,700 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 32.3580, -115.2135. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 77 km (48 mi) | N | earthquakes near Imperial 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.
- 1.8 2km SSW of Calexico, CA
- 2.0 8km NNW of Delta, B.C., MX
- 2.3 7km NNW of Delta, B.C., MX
- 2.0 5km E of Puebla, B.C., MX
- 1.6 6km ENE of Puebla, B.C., MX
- 1.8 7km ESE of Puebla, B.C., MX
- 1.9 6km ENE of Puebla, B.C., MX
- 1.6 6km NE of Puebla, B.C., MX
- 3.1 6km NE of Puebla, B.C., MX
- 1.9 6km ENE of Puebla, B.C., MX
- 2.8 6km ENE of Puebla, B.C., MX
- 2.4 6km ENE of Puebla, B.C., MX
- 2.2 5km ENE of Puebla, B.C., MX
- 2.1 5km ENE of Puebla, B.C., MX
- 1.9 6km ENE 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
- 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.