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Japan earthquakes in 1985

548 earthquakes of magnitude 4.5 or more were located in Japan in 1985. The largest: M6.5 75 km ENE of Namie, Japan, Aug 12, 1985.

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

19841986

Map

Where every quake of 1985 was located in Japan. Select one for its page.

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Every quake of 1985

Magnitude 4.5 and up, newest first; the 400 largest shown of 548.

The largest

The 25 largest of 1985 in Japan.

Month by month

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

MonthQuakesLargestWhere
January 1985255.744 km SSE of Aso, Japan
February 1985186.1104 km NNE of Nago, Japan
March 1985286.49 km N of Takanosu, Japan
April 1985226.5Bonin Islands, Japan region
May 1985295.621 km WNW of Sukumo, Japan
June 1985295.6169 km ESE of Nishinoomote, Japan
July 1985365.49 km SSE of Miharu, Japan
August 1985556.575 km ENE of Namie, Japan
September 1985916.4Bonin Islands, Japan region
October 1985806.1Bonin Islands, Japan region
November 1985816.2Bonin Islands, Japan region
December 1985545.8Bonin Islands, Japan region

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 1985

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.