Earthquakes in St. Martin through history

NOAA’s record here begins on November 1, 1755 with a tsunami (Lisbon). NOAA lists one tsunami from elsewhere that reached St. Martin with deaths or a metre of water or more. The highest water NOAA records here was 4.5 m, on November 1, 1755.

• September 29, 1925Earthquake · M 6.174 km NNE of The Valley, AnguillaUSGS
• November 1, 1755Tsunami · 4.5 m hereLisbonNOAA NCEI · Wikipedia

• An event counts for St. Martin 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 St. Martin 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 St. Martin, 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