Earthquakes near Guelma through history

The strongest was a magnitude 5.9 on October 27, 1985 (Annaba-Setif-Souk). It was also the deadliest: NOAA records 6 deaths for it. NOAA records deaths in 2 of the events here, 9 in all. NOAA’s record here begins on June 4, 1725 with a tsunami (Bone (Annaba)). NOAA lists one tsunami that began within 100 km of Guelma, and one from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 1 m, on August 22, 1856.

• October 27, 1985Earthquake · M 5.9Annaba-Setif-Souk · 6 deaths (NOAA)NOAA NCEI
• August 6, 1947Earthquake · M 5.33 deaths (NOAA)NOAA NCEI
• August 22, 1856Tsunami · 1 m hereSea Of AlboranNOAA NCEI · Wikipedia
• June 4, 1725TsunamiBone (Annaba)NOAA NCEI

• An event counts for Guelma 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