Antigua & Barbuda

Earthquakes in Antigua & Barbuda, 1927–2026

From 1927 to October 19, 2026, USGS recorded 9 earthquakes of magnitude 6 or more in or off Antigua & Barbuda. The strongest was a magnitude 7.5 on October 8, 1974 (25 km NW of Saint John’s, Antigua and Barbuda).

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The last 30 days · as of

USGS recorded no earthquake of magnitude 4.5 or more in the area the map frames in the last 30 days.

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What the record holds

2 earthquakes here in these years are on NOAA’s list of significant earthquakes. NOAA records no deaths for any of them. The latest on NOAA’s list is a magnitude 6.5 on March 16, 1985 (18 km SE of Market Shop, Saint Kitts and Nevis). NOAA lists one tsunami that began in or off Antigua & Barbuda. It reached 0.12 m, on March 16, 1985.

The events

  • July 10, 2023Earthquake · M 6.6278 km NNE of Codrington, Antigua and BarbudaUSGS
  • March 16, 1985Earthquake · M 6.518 km SE of Market Shop, Saint Kitts and NevisUSGS · NOAA NCEI
  • March 16, 1985Tsunami · 0.12 m highGuadeloupeNOAA NCEI
  • October 8, 1974Earthquake · M 7.525 km NW of Saint John’s, Antigua and BarbudaUSGS · NOAA NCEI · Wikipedia
  • December 24, 1967Earthquake · M 6.464 km ENE of Parham, Antigua and BarbudaUSGS
  • November 10, 1935Earthquake · M 6.232 km SSE of Fig Tree, Saint Kitts and NevisUSGS

Good to know

  • An event counts for Antigua & Barbuda when it began inside its borders, or at sea within 100 km of its coast (so one can count for two neighbours), or further out, up to 300 km, where Antigua & Barbuda is the nearest country.
  • USGS counts here start at magnitude 6: the catalogue’s smaller quakes thin out going back, where few instruments listened.
  • NOAA lists significant events only: earthquakes that killed, did about $1 million of damage, reached magnitude 7.5 or intensity X, or raised a tsunami, and eruptions and tsunamis by like measures. Magnitudes before 1900 are its estimates from written accounts.
  • Deaths are NOAA’s total for each event, wherever people died, its tsunami and fires included. A tsunami counts the dead its runup records give for this place: NOAA’s total for a tsunami includes its source quake’s.
  • A tsunami from elsewhere counts where one of its runups killed or rose a metre or more.
  • The map frames the box around Antigua & Barbuda, its neighbours’ quakes included, so its count runs higher than this page’s.
  • Counted to October 19, 2026, as is the map. The last 30 days ask USGS again.

How the layers work, where their data comes from and what they can’t tell you: Earthquakes, live, The world through history

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