Earthquakes near Livorno through history

It was also the deadliest: NOAA records 1,400 deaths for it. NOAA’s list of significant earthquakes has 17 here, back to 1345. NOAA records deaths in 4 of the events here, 1,574 in all. The latest on NOAA’s list is an earthquake on November 18, 1958 (N). NOAA’s record here begins on September 12, 1345 with an earthquake (Firenze (Florence)). NOAA lists 7 tsunamis that began within 100 km of Livorno.

• November 18, 1958EarthquakeNNOAA NCEI
• September 7, 1920Earthquake · M 6.32 km SW of Molazzana, Italy · 1,400 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• August 14, 1846Earthquake · M 6.1 (est.)Orciano, Luciana · 56 deaths (NOAA)NOAA NCEI
• April 5, 1646TsunamiLivornoNOAA NCEI
• September 12, 1345EarthquakeFirenze (Florence)NOAA NCEI

• An event counts for Livorno 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