Kawagoe

Earthquakes near Kawagoe through history

From 1900 to October 19, 2026, USGS recorded 28 earthquakes of magnitude 6 or more within 100 km of Kawagoe, or 200 km for magnitude 7 and above. 9 of them reached magnitude 7 or more; the strongest on either list was an estimated magnitude 8.2 on December 30, 1703 (Off Sw Boso Peninsula).

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The last 30 days · as of

USGS recorded 7 earthquakes of magnitude 4.5 or more within 100 km of Kawagoe 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 8 on September 1, 1923 (Tokyo, Yokohama), for which NOAA records 105,385 deaths. NOAA’s list of significant earthquakes has 32 here, back to AD 818. NOAA records deaths in 26 of the events here, 154,171 in all. The latest on NOAA’s list is a magnitude 7.9 on March 11, 2011 (Near E Coast Honshu). NOAA’s record here begins in August 818 with an earthquake (Tokkaido). It grows thinner going back: 9 of the 32 significant earthquakes NOAA lists here are from 1927 on. NOAA lists 9 tsunamis that began within 100 km of Kawagoe, and 11 from elsewhere that reached it with deaths or a metre of water or more. The highest water NOAA records here was 12 m, on September 1, 1923. The deadliest here came on December 30, 1703 from a magnitude 8.2 earthquake (Off Sw Boso Peninsula): NOAA’s runup records count 830 deaths within 100 km of Kawagoe. NOAA lists 7 significant eruptions of 3 volcanoes within 100 km of Kawagoe. The largest was Fujisan on December 16, 1707, at 4 on the volcanic explosivity index.

The events

Good to know

  • An event counts for Kawagoe 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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