Earthquakes near Iguala de la Independencia, 1927–2026

The deadliest was not the strongest: a magnitude 7.1 on September 19, 2017 (1 km S of Matzaco, Mexico), for which NOAA records 369 deaths. 8 earthquakes here in these years are on NOAA’s list of significant earthquakes. NOAA records deaths in 6 of the events here, 461 in all. The ten years with the most magnitude 6+ earthquakes were 1957–1966, with 3 of the 11. The latest on NOAA’s list is a magnitude 7 on September 8, 2021 (Acapulco, Mexico).

• September 8, 2021Earthquake · M 7.0Acapulco, Mexico · 3 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• September 19, 2017Earthquake · M 7.11 km S of Matzaco, Mexico · 369 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• March 14, 1979Earthquake · M 7.612 km SSE of Vallecitos de Zaragoza, Mexico · 5 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• July 28, 1957Earthquake · M 7.68 km ENE of Apantla, Mexico · 65 deaths (NOAA)USGS · NOAA NCEI · Wikipedia

• An event counts for Iguala de la Independencia 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