Earthquakes near Komatsu, 1927–2026

The deadliest was not the strongest: a magnitude 6.8 on June 28, 1948 (3 km W of Maruoka, Japan), for which NOAA records 5,131 deaths. 4 earthquakes here in these years are on NOAA’s list of significant earthquakes. NOAA records deaths in 4 of the events here, 8,712 in all. NOAA lists 2 tsunamis from elsewhere that reached the coast within 100 km of Komatsu with deaths or a metre of water or more. The highest water NOAA records here was 12.7 m, on May 26, 1983.

• January 1, 2024Earthquake · M 7.52024 Noto Peninsula, Japan Earthquake · 549 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• May 26, 1983Tsunami · 12.7 m hereNoshiro, JapanNOAA NCEI · Wikipedia
• June 28, 1948Earthquake · M 6.83 km W of Maruoka, Japan · 5,131 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
• March 7, 1927Earthquake · M 7.015 km E of Toyooka, Japan · 3,022 deaths (NOAA)USGS · NOAA NCEI · Wikipedia

• An event counts for Komatsu 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