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Japan earthquakes in 1923

23 earthquakes of magnitude 4.5 or more were located in Japan in 1923. The largest: M8.0 5 km SSE of ?iso, Japan, Sep 1, 1923.

From the USGS catalog. Times are local to each quake.

19221924

Map

Where every quake of 1923 was located in Japan. Select one for its page.

Open the live map with earthquakes

Every quake of 1923

Magnitude 4.5 and up, newest first.

Month by month

Counted by UTC date, which is how the catalog files them.

MonthQuakesLargestWhere
January 19230
February 19230
March 19230
April 192317.070 km WNW of Naha, Japan
May 192316.0140 km E of Hasaki, Japan
June 192337.264 km ENE of Hasaki, Japan
July 192337.422 km N of Nishinoomote, Japan
August 192326.8148 km SE of Katsuren-haebaru, Japan
September 192388.05 km SSE of ?iso, Japan
October 19230
November 192347.2101 km NE of Naze, Japan
December 192316.392 km ENE of Hasaki, Japan

What this means

The catalog is only as complete as the instruments of the time. Worldwide coverage of magnitude 5 and up dates from the 1960s, and of 4.5 from the 1990s; earlier years hold the large quakes and the ones near a station, so a low count in an early year means fewer instruments, not a quiet earth.

By year

Every year the USGS catalog covers.

Nearby

Japan nowWorldwide in 1923

Sources

Earthquakes, magnitudes, depths, shaking estimates and felt reports from the U.S. Geological Survey Earthquake Hazards Program, read from its live feeds and its catalog back to 1900. Tsunami messages from NOAA’s tsunami warning centers.