Earthquake · reviewed by a seismologist
M 1.7ml
20 km W of Delta, B.C., MX
Yes. A magnitude 1.7 earthquake was recorded 20 km W of Delta, B.C., MX, 85 km (53 mi) WSW of Yuma, AZ, at 1:28 pm PDT on 21 September 2026 (20:28 UTC), 7.7 km deep.
85 km (53 mi) WSW of Yuma, AZ
- When
- Magnitude
- M 1.7 (ml)
- Depth
- 7.7 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 75 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 52 days ago
Earthquake alerts for Calexico, CA
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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 9 km (6 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 100× the energy of this one
- This earthquake M 1.7 about 9.3 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 4.9 on 2024-05-12 — about 63,000 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 32.3637, -115.4097. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 75 km (47 mi) | N | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.3 6 km N of Delta, B.C., MX
- 2.5 7 km NNE of Delta, B.C., MX
- 2.1 6 km NNE of Delta, B.C., MX
- 1.9 9 km NNE of Delta, B.C., MX
- 3.0 7 km NNE of Delta, B.C., MX
- 1.8 8 km NE of Delta, B.C., MX
- 2.2 7 km NE of Delta, B.C., MX
- 2.2 9 km NNE of Delta, B.C., MX
- 4.9 9 km N of Delta, B.C., MX
- 3.5 8 km NNE of Delta, B.C., MX
- 1.6 7 km NW of Delta, B.C., MX
- 1.7 8 km NNE of Delta, B.C., MX
- 1.8 9 km NNE of Delta, B.C., MX
- 1.7 8 km NE of Delta, B.C., MX
- 1.4 8 km NNE 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.