QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

9km SSW of Progreso, B.C., MX

· 4.3 km deep · released about 17 lb of TNT

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10 km30 km60 km120 km N Imperial County 65 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 1.8 (ml)
Depth
4.3 km below the surface
Felt
no reports yet
Nearest
Imperial County, 65 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3518 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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.

Where

Epicentre 32.5050, -115.6310. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Imperial County, CA 65 km (40 mi) SSW of here earthquakes near Imperial County
San Diego County, CA 122 km (76 mi) ESE of here 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. 1.6 4km SW of Imperial, CA
  2. 1.6 8km NE of Imperial, CA
  3. 2.1 6km NNE of Puebla, B.C., MX
  4. 1.8 7km NNE of Puebla, B.C., MX
  5. 2.1 6km W of Alberto Oviedo Mota, B.C., MX
  6. 1.7 7km W of Holtville, CA
  7. 2.2 4km NNW of Delta, B.C., MX
  8. 1.6 6km ENE of Imperial, CA
  9. 3.3 17km W of Delta, B.C., MX
  10. 1.6 16km WNW of Progreso, B.C., MX
  11. 2.7 21km SSW of Puebla, B.C., MX
  12. 1.9 10km SSW of Progreso, B.C., MX
  13. 1.5 18km WNW of Progreso, B.C., MX
  14. 1.8 6km SSE of Brawley, CA
  15. 2.0 7km SSE of Brawley, 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.