Earthquake · reviewed by a seismologist
M 3.6ml
10km S of Progreso, B.C., MX
Yes. A magnitude 3.6 earthquake was recorded 10km S of Progreso, B.C., MX, at 7:06 pm PDT on 8 April 2023 (02:06 UTC), 15 km deep. 13 people have reported feeling it to USGS.
- When
- Magnitude
- M 3.6 (ml)
- Depth
- 15 km below the surface
- Felt
- 13 reports · strongest reported intensity III
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Imperial County, 64 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1244 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 71 km (44 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 22 km, intensity III · El Centro 33 km, intensity II · Imperial 39 km, intensity II · Holtville 40 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 4.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 38,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,700× the energy of this one
- Magna, Utah 2020 M 5.7 1,200× the energy of this one
- This earthquake M 3.6 about 4.5 tons of TNT
- Around the size people start to feel M 3.0 this one released 9.4× 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 57 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 32.4947, -115.5727. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 64 km (40 mi) | NNE | earthquakes near Imperial County |
| San Diego County, CA | 127 km (79 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
60 earthquakes have been recorded within 50 km since this one.
- 1.7 3km NW of Calexico, CA
- 1.7 3km S of Heber, CA
- 2.1 4km WNW of Calexico, CA
- 1.8 3km S of Heber, CA
- 1.6 3km SSW of Heber, CA
- 1.7 1km N of Heber, CA
- 1.9 3km S of Heber, CA
- 1.8 3km SSW of Heber, CA
- 3.2 3km SW of Heber, CA
- 4.1 3 km SSW of Heber, CA
- 1.8 3km SSW of Heber, CA
- 1.5 4km WNW of Calexico, CA
- 1.8 2km SW of Heber, CA
- 1.7 3km SSW of Heber, CA
- 2.3 3km SSW of Heber, CA
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.