QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

12km NNW of Progreso, B.C., MX

Yes. A magnitude 2.7 earthquake was recorded 12km NNW of Progreso, B.C., MX, at 4:51 pm PDT on 31 October 2017 (23:51 UTC), 14 km deep. 28 people have reported feeling it to USGS.

· 14 km deep · released about 380 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 50 kmSan Diego County 112 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.7 (ml)
Depth
14 km below the surface
Felt
28 reports · strongest reported intensity III
Nearest
Imperial County, 50 km NE
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 3262 days ago

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 22 km (14 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 15 km, intensity II · El Centro 16 km, intensity II · Imperial 21 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 380 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 40,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 29,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 380 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 89 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 32.6743, -115.6568. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Imperial County, CA 50 km (31 mi) NE earthquakes near Imperial County
San Diego County, CA 112 km (69 mi) WNW earthquakes near San Diego County
Riverside County, CA 122 km (76 mi) NNW earthquakes near Riverside County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

45 earthquakes have been recorded within 50 km since this one.

  1. 1.6 16km S of Progreso, B.C., MX
  2. 1.8 6km NNW of Brawley, CA
  3. 2.3 10km S of Progreso, B.C., MX
  4. 2.0 19km WNW of Progreso, B.C., MX
  5. 1.7 14km SSW of Westmorland, CA
  6. 1.6 18km NNW of Ocotillo, CA
  7. 1.9 8km NW of Delta, B.C., MX
  8. 1.9 12km SE of Puebla, B.C., MX
  9. 2.1 14km SW of Westmorland, CA
  10. 2.0 14km SW of Westmorland, CA
  11. 1.8 15km SW of Westmorland, CA
  12. 1.6 20km W of Delta, B.C., MX
  13. 1.5 4km NE of Westmorland, CA
  14. 2.9 18km ESE of Ocotillo, CA
  15. 1.6 20km W of Westmorland, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.