Kofu

Earthquakes near Kofu through history

From 1900 to October 19, 2026, USGS recorded 20 earthquakes of magnitude 6 or more within 100 km of Kofu, or 200 km for magnitude 7 and above. 5 of them reached magnitude 7 or more; the strongest on either list was a magnitude 8.4, twice: on October 28, 1707 (Enshunada) and 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 Kofu 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 37 here, back to AD 745. NOAA records deaths in 42 of the events here, 178,866 in all. The latest on NOAA’s list is a magnitude 5 on July 9, 1989 (Honshu: Ito, Ajiro). NOAA’s record here begins on June 5, 745 with an earthquake (Mino). 30 of the 37 significant earthquakes NOAA lists here came before 1927. NOAA lists 7 tsunamis that began within 100 km of Kofu, and 14 from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 10.5 m, on December 23, 1854. The deadliest here came on September 20, 1498 from a magnitude 8.3 earthquake (Enshunada Sea): NOAA’s runup records count 26,200 deaths within 100 km of Kofu. NOAA lists 24 significant eruptions of 3 volcanoes within 100 km of Kofu. The largest was Fujisan on December 16, 1707, at 4 on the volcanic explosivity index.

The events

  • July 9, 1989Earthquake · M 5.0Honshu: Ito, AjiroNOAA NCEI
  • 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 23, 1854Tsunami · 10.5 m hereEnshunada Sea · 11 deaths here (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 · 26,200 deaths here (NOAA)NOAA NCEI
  • June 5, 745Earthquake · M 7.9 (est.)MinoNOAA NCEI

Good to know

  • An event counts for Kofu 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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