Earthquakes near Pitalito through history

The deadliest was not the strongest: a magnitude 4.9 on March 31, 1983 (Sw, Popayan), for which NOAA records 350 deaths. NOAA’s list of significant earthquakes has 9 here, back to 1566. NOAA records deaths in 4 of the events here, 715 in all. The latest on NOAA’s list is a magnitude 5 on March 6, 2007 (Cauca, Sotara, Purace,). NOAA’s record here begins in 1566 with an earthquake. 6 of the 9 significant earthquakes NOAA lists here came before 1927. NOAA lists 2 significant eruptions of one volcano within 100 km of Pitalito. The largest was Purace on May 25, 1885, at 3 on the volcanic explosivity index.

• March 6, 2007Earthquake · M 5.0Cauca, Sotara, Purace,NOAA NCEI
• March 31, 1983Earthquake · M 4.9Sw, Popayan · 350 deaths (NOAA)NOAA NCEI · Wikipedia
• February 3, 1906Earthquake · M 7.7NOAA NCEI
• May 25, 1885Eruption · VEI 3PuraceNOAA NCEI · Wikipedia
• 1566Earthquake · M 7.8 (est.)NOAA NCEI

• An event counts for Pitalito 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