Mito

Earthquakes near Mito, 1927–2026

From 1927 to October 19, 2026, USGS recorded 49 earthquakes of magnitude 6 or more within 100 km of Mito, or 200 km for magnitude 7 and above. 13 of them reached magnitude 7 or more; the strongest was a magnitude 7.9 on March 11, 2011 (Near E Coast Honshu).

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The last 30 days · as of

USGS recorded 7 earthquakes of magnitude 4.5 or more within 100 km of Mito in the last 30 days.

The latest: magnitude 4.5 on October 21 (2 km N of Honchō, Japan). The strongest: magnitude 5.3 on October 1 (0 km NNE of Yōkaichiba, Japan).

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What the record holds

The deadliest was not the strongest: a magnitude 6.5 on September 21, 1931 (1 km WNW of Kumagaya, Japan), for which NOAA records 16 deaths. 16 earthquakes here in these years are on NOAA’s list of significant earthquakes. NOAA records deaths in 6 of the events here, 369 in all. The latest on NOAA’s list is a magnitude 7.3 on March 16, 2022 (57 km ENE of Namie, Japan). NOAA lists 2 tsunamis that began within 100 km of Mito, and 8 from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 15.24 m, on March 11, 2011. The deadliest here came on March 11, 2011 from a magnitude 9.1 earthquake (Honshu Island): NOAA’s runup records count 354 deaths within 100 km of Mito.

The events

  • March 16, 2022Earthquake · M 7.357 km ENE of Namie, Japan · 4 deaths (NOAA)USGS · NOAA NCEI · Wikipedia
  • March 11, 2011Earthquake · M 7.9Near E Coast HonshuUSGS · NOAA NCEI · Wikipedia
  • March 11, 2011Tsunami · 15.24 m hereHonshu Island · 354 deaths here (NOAA)NOAA NCEI · Wikipedia
  • November 5, 1938Earthquake · M 7.8105 km E of Iwaki, Japan · one death (NOAA)USGS · NOAA NCEI
  • September 21, 1931Earthquake · M 6.51 km WNW of Kumagaya, Japan · 16 deaths (NOAA)USGS · NOAA NCEI

Good to know

  • An event counts for Mito 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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