Earthquake · reviewed by a seismologist
M 1.5ml
10km W of Progreso, B.C., MX
Yes. A magnitude 1.5 earthquake was recorded 10km W of Progreso, B.C., MX, at 4:45 am PDT on 9 April 2018 (11:45 UTC), 8.9 km deep.
- When
- Magnitude
- M 1.5 (ml)
- Depth
- 8.9 km below the surface
- Felt
- no reports yet
- Nearest
- Imperial County, 61 km NNE
- Nearest mapped fault
- Yuha Basin faults, 14 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 3030 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, Seeley, El Centro.
How big was it?
This earthquake released about 6.2 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 1,700,000× the energy of this one
- Around the size people start to feel M 3.0 150× the energy of this one
- This earthquake M 1.5 about 6.2 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 5,400 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 32.5772, -115.6950. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Imperial County, CA | 61 km (38 mi) | NNE | earthquakes near Imperial County |
| San Diego County, CA | 113 km (70 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
51 earthquakes have been recorded within 50 km since this one.
- 1.9 20km WNW of Imperial, CA
- 2.2 13km WSW of Delta, B.C., MX
- 2.2 12km WSW of Imperial, CA
- 1.6 11km WNW of Progreso, B.C., MX
- 1.5 11km WNW of Progreso, B.C., MX
- 1.8 14km SE of Progreso, B.C., MX
- 2.2 15km N of Delta, B.C., MX
- 1.8 12km S of Progreso, B.C., MX
- 2.2 6km ESE of Ocotillo, CA
- 1.6 16km SE of Ocotillo, CA
- 1.7 16km SE of Ocotillo, CA
- 3.0 15km SE of Ocotillo, CA
- 1.9 8km NW of Delta, B.C., MX
- 2.4 9km S of Progreso, B.C., MX
- 2.0 4km NNE 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.