Earthquakes near Riobamba, 2017–2026

It was also the deadliest: NOAA records one death for it. One earthquake here in these years is on NOAA’s list of significant earthquakes. NOAA lists one significant eruption of one volcano within 100 km of Riobamba. The largest was Sangay on March 5, 2021, at 2 on the volcanic explosivity index.

• March 5, 2021Eruption · VEI 2SangayNOAA NCEI · Wikipedia
• February 22, 2019Earthquake · M 7.5115 km ESE of Palora, Ecuador · one death (NOAA)USGS · NOAA NCEI · Wikipedia
• September 7, 2018Earthquake · M 6.28 km SE of Alausí, EcuadorUSGS

• An event counts for Riobamba 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 are its ComCat catalogue’s earthquakes of magnitude 4.5 or more, aftershocks included.
• 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