M6.6 earthquake in Central Mid-Atlantic Ridge on June 17, 2026

On June 17, 2026 at 18:56 UTC the ground shook with a magnitude 6.6 earthquake. The epicenter was 1,260 km southwest of Freetown, with the focus 10 km deep. It was a shallow quake, and shallow quakes are usually felt most strongly at the surface.

6.6magnitude
10 kmdepth
18:56time UTC
greenUSGS alert
Live earthquake map →

Key facts

The USGS PAGER system issued a green alert, expecting little impact.

Nearest cities

  • Freetown (Sierra Leone)1,260 km
  • Monrovia (Liberia)1,281 km
  • Bo (Sierra Leone)1,324 km
  • Conakry (Guinea)1,328 km
  • Kenema (Sierra Leone)1,360 km

Did you feel an earthquake?

Report it to seismologists. These reports help work out quickly where the shaking was strongest. It takes a minute.

Report to USGS (Did You Feel It?)Report to EMSC (LastQuake)

Aftershocks

Since then USGS has recorded 8 quakes of magnitude 4.5 or more within 150 km, the strongest M6.8.

  • M6.8 · Oct 13, 12:23 UTC71 km
  • M6.7 · Oct 13, 05:44 UTC86 km
  • M5.4 · Jun 18, 03:43 UTC19 km
  • M5.3 · Oct 5, 01:18 UTC21 km
  • M5.1 · Jun 18, 02:44 UTC79 km
  • M4.7 · Oct 14, 14:17 UTC97 km
  • M4.7 · Aug 25, 22:23 UTC30 km
  • M4.5 · Jul 2, 06:02 UTC5 km

Regional history

Since 1976 there have been 20 earthquakes of magnitude 6 or more within 300 km. The strongest was M7.1 (August 29, 2016).

  • M7.1 · August 29, 2016254 km
  • M6.9 · September 4, 2022189 km
  • M6.8 · May 18, 1995219 km
  • M6.8 · December 26, 199281 km
  • M6.8 · January 12, 2005132 km

See also

Live earthquake mapAll earthquakes todayWeather in FreetownEvent details at USGS

Source: USGS Earthquake Hazards Program (public domain). Seismologists may still revise the data. Data from Aug 31, 21:48 UTC.