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Japan earthquakes in 1947

13 earthquakes of magnitude 4.5 or more were located in Japan in 1947. The largest: M7.1 72 km W of Rumoi, Japan, Nov 4, 1947.

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

19461948

Map

Where every quake of 1947 was located in Japan. Select one for its page.

Open the live map with earthquakes

Every quake of 1947

Magnitude 4.5 and up, newest first.

Month by month

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

MonthQuakesLargestWhere
January 194716.467 km SSW of Tanabe, Japan
February 194746.456 km S of Muroto-misakicho, Japan
March 194716.034 km SSE of Yonakuni, Japan
April 194716.443 km W of Yonakuni, Japan
May 194726.0124 km SSW of Yonakuni, Japan
June 19470
July 194716.243 km SW of Shing?, Japan
August 194716.0Izu Islands, Japan region
September 19470
October 19470
November 194727.172 km W of Rumoi, Japan
December 19470

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 1947

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.