Earthquakes near Zanjan through history

The deadliest was not the strongest: a magnitude 7.4 on June 20, 1990 (Rasht, Qazvin, Zanjan, Rudbar, Manjil), for which NOAA records 40,000 deaths. NOAA’s list of significant earthquakes has 9 here, back to 1400. NOAA records deaths in 5 of the events here, 55,245 in all. NOAA’s record here begins in 1400 with an earthquake (Rudbar). NOAA lists one tsunami that began within 100 km of Zanjan. It reached 2 m, on June 20, 1990.

• June 20, 1990Earthquake · M 7.4Rasht, Qazvin, Zanjan, Rudbar, Manjil · 40,000 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• June 20, 1990Tsunami · 2 m highCaspian SeaNOAA NCEI · Wikipedia
• April 20, 1608Earthquake · M 7.6 (est.)Gilan, W Mazandaran · 3,000 deaths (NOAA)NOAA NCEI
• 1400EarthquakeRudbarNOAA NCEI

• An event counts for Zanjan 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