Algeciras

Earthquakes near Algeciras through history

From 1900 to October 19, 2026, USGS recorded one earthquake of magnitude 6 or more within 100 km of Algeciras, or 200 km for magnitude 7 and above. The strongest was a magnitude 7.8 on March 29, 1954 (Strait of Gibraltar).

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The last 30 days · as of

USGS recorded no earthquake of magnitude 4.5 or more within 100 km of Algeciras in the last 30 days.

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What the record holds

The deadliest was not the strongest: an earthquake on January 29, 1909 (Tetuan (Tetouan),Romars), for which NOAA records 100 deaths. NOAA’s list of significant earthquakes has 4 here, back to 1755. NOAA records deaths in 2 of the events here, 1,156 in all. NOAA’s record here begins on November 1, 1755 with a tsunami (Lisbon). NOAA lists one tsunami that began within 100 km of Algeciras, and one from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 18.3 m, on November 1, 1755. The deadliest here came on November 1, 1755 from a magnitude 8.5 earthquake (Lisbon): NOAA’s runup records count 1,056 deaths within 100 km of Algeciras.

The events

  • March 29, 1954Earthquake · M 7.8Strait of GibraltarUSGS · NOAA NCEI · Wikipedia
  • January 29, 1909EarthquakeTetuan (Tetouan),Romars · 100 deaths (NOAA)NOAA NCEI
  • May 6, 1773EarthquakeTangiersNOAA NCEI
  • November 1, 1755Tsunami · 18.3 m hereLisbon · 1,056 deaths here (NOAA)NOAA NCEI · Wikipedia

Good to know

  • An event counts for Algeciras when it began within 100 km of its centre, or 200 km for an earthquake of magnitude 7 or more. Damage can reach further.
  • 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.
  • 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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