Iida

Earthquakes near Iida through history

From 1900 to October 19, 2026, USGS recorded 11 earthquakes of magnitude 6 or more within 100 km of Iida, or 200 km for magnitude 7 and above. 4 of them reached magnitude 7 or more; the strongest on either list was a magnitude 8.4, three times, most recently on October 27, 1891 (Mino-Owari).

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The last 30 days · as of

USGS recorded no earthquake of magnitude 4.5 or more within 100 km of Iida in the last 30 days.

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What the record holds

The deadliest was not the strongest: a magnitude 8 on September 1, 1923 (Tokyo, Yokohama), for which NOAA records 105,385 deaths. NOAA’s list of significant earthquakes has 33 here, back to AD 745. NOAA records deaths in 24 of the events here, 172,867 in all. The latest on NOAA’s list is a magnitude 6.2 on August 10, 2009 (8 km NE of Sagara, Japan). NOAA’s record here begins on June 5, 745 with an earthquake (Mino). 28 of the 33 significant earthquakes NOAA lists here came before 1927. NOAA lists 4 tsunamis that began within 100 km of Iida, and 11 from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 6.2 m, on December 7, 1944. The deadliest here came on September 20, 1498 from a magnitude 8.3 earthquake (Enshunada Sea): NOAA’s runup records count 26,000 deaths within 100 km of Iida. NOAA lists 4 significant eruptions of 3 volcanoes within 100 km of Iida. The largest was Fujisan on December 16, 1707, at 4 on the volcanic explosivity index.

The events

  • August 10, 2009Earthquake · M 6.28 km NE of Sagara, Japan · one death (NOAA)USGS · NOAA NCEI · Wikipedia
  • December 7, 1944Tsunami · 6.2 m hereOff Southeast Coast Kii PeninsulaNOAA NCEI · Wikipedia
  • September 1, 1923Earthquake · M 8.0Tokyo, Yokohama · 105,385 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
  • October 27, 1891Earthquake · M 8.4 (est.)Mino-Owari · 7,273 deaths (NOAA)NOAA NCEI · Wikipedia
  • December 16, 1707Eruption · VEI 4FujisanNOAA NCEI · Wikipedia
  • October 28, 1707Earthquake · M 8.4 (est.)Enshunada · 2,000 deaths (NOAA)NOAA NCEI · Wikipedia
  • September 20, 1498Tsunami · 10 m highEnshunada Sea · 26,000 deaths here (NOAA)NOAA NCEI
  • December 17, 1096Earthquake · M 8.4 (est.)Enshunada · 400 deaths (NOAA)NOAA NCEI
  • June 5, 745Earthquake · M 7.9 (est.)MinoNOAA NCEI

Good to know

  • An event counts for Iida 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

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