Tokushima

Earthquakes near Tokushima, 1927–2026

From 1927 to October 19, 2026, USGS recorded 12 earthquakes of magnitude 6 or more within 100 km of Tokushima, or 200 km for magnitude 7 and above. 5 of them reached magnitude 7 or more; the strongest was a magnitude 8.3 on December 20, 1946 (Honshu: S Coast).

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The last 30 days · as of

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

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What the record holds

The deadliest was not the strongest: a magnitude 6.9 on January 16, 1995 (8 km S of Akashi, Japan), for which NOAA records 6,434 deaths. 6 earthquakes here in these years are on NOAA’s list of significant earthquakes. NOAA records deaths in 4 of the events here, 12,218 in all. The ten years with the most magnitude 6+ earthquakes were 1937–1946, with 5 of the 12. The latest on NOAA’s list is a magnitude 5.8 on April 12, 2013. NOAA lists 2 tsunamis that began within 100 km of Tokushima, and 4 from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 6.5 m, on December 20, 1946. The deadliest here came on December 20, 1946 from a magnitude 8.3 earthquake (S Coast): NOAA’s runup records count 207 deaths within 100 km of Tokushima.

The events

Good to know

  • An event counts for Tokushima 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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