Earthquake · reviewed by a seismologist
M 1.5ml
4km SSW of Progreso, B.C., MX
Yes. A magnitude 1.5 earthquake was recorded 4km SSW of Progreso, B.C., MX, at 2:52 am PST on 8 December 2016 (10:52 UTC), 8.4 km deep.
- When
- Magnitude
- M 1.5 (ml)
- Depth
- 8.4 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 59 km NNE
- Nearest mapped fault
- Yuha Basin faults, 23 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 3583 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, people at rest would likely notice it out to about 6 km (4 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.
Earthquakes near other towns within 30 km: Calexico, Heber, El Centro, Seeley.
How big was it?
This earthquake released about 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
- Around the size people start to feel M 3.0 160× the energy of this one
- This earthquake M 1.5 about 5.9 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 4.0 on 2016-07-31 — about 5,600 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 32.5485, -115.6005. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 59 km (37 mi) | NNE | earthquakes near Imperial County |
| San Diego County, CA | 122 km (76 mi) | WNW | earthquakes near San Diego 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.
- 1.5 3km WSW of Brawley, CA
- 1.6 2km WSW of Brawley, CA
- 2.5 2km WSW of Brawley, CA
- 2.2 2km WSW of Brawley, CA
- 2.1 2km WSW of Brawley, CA
- 2.1 2km WSW of Brawley, CA
- 2.6 1km WSW of Brawley, CA
- 2.3 2km WSW of Brawley, CA
- 1.6 2km SW of Brawley, CA
- 1.7 2km SW of Brawley, CA
- 1.6 2km SW of Brawley, CA
- 1.6 2km WSW of Brawley, CA
- 1.5 2km SW of Brawley, CA
- 2.4 15km W of Delta, B.C., MX
- 1.6 15km WNW of Progreso, 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.