Japan earthquakes in 1921
11 earthquakes of magnitude 4.5 or more were located in Japan in 1921. The largest: M7.0 84 km SE of Ishigaki, Japan, Apr 2, 1921.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1921 was located in Japan. Select one for its page.
Every quake of 1921
Magnitude 4.5 and up, newest first.
- 6.46 km NNW of Narita, Japan · 60 km deep
- 6.3117 km E of Hachinohe, Japan · 35 km deep
- 6.3Izu Islands, Japan region · 15 km deep
- 6.01 km NW of Asaka, Japan · 35 km deep
- 6.011 km E of Nemuro, Japan · 35 km deep
- 6.276 km NNE of Naze, Japan · 35 km deep
- 6.0113 km NNE of Naze, Japan · 15 km deep
- 6.2153 km WNW of Naze, Japan · 15 km deep
- 6.3136 km E of Naze, Japan · 15 km deep
- 7.084 km SE of Ishigaki, Japan · 15 km deep
- 6.692 km WSW of Kamiiso, Japan · 15 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1921 | 0 | ||
| February 1921 | 0 | ||
| March 1921 | 1 | 6.6 | 92 km WSW of Kamiiso, Japan |
| April 1921 | 1 | 7.0 | 84 km SE of Ishigaki, Japan |
| May 1921 | 1 | 6.3 | 136 km E of Naze, Japan |
| June 1921 | 1 | 6.2 | 153 km WNW of Naze, Japan |
| July 1921 | 2 | 6.2 | 76 km NNE of Naze, Japan |
| August 1921 | 2 | 6.0 | 1 km NW of Asaka, Japan |
| September 1921 | 2 | 6.3 | 117 km E of Hachinohe, Japan |
| October 1921 | 0 | ||
| November 1921 | 0 | ||
| December 1921 | 1 | 6.4 | 6 km NNW of Narita, 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.
- 2020s2020202120222023202420252026
- 2010s2010201120122013201420152016201720182019
- 2000s2000200120022003200420052006200720082009
- 1990s1990199119921993199419951996199719981999
- 1980s1980198119821983198419851986198719881989
- 1970s1970197119721973197419751976197719781979
- 1960s1960196119621963196419651966196719681969
- 1950s1950195119521953195419551956195719581959
- 1940s1940194119421943194419451946194719481949
- 1930s1930193119321933193419351936193719381939
- 1920s1920192119221923192419251926192719281929
- 1910s1910191119121913191419151916191719181919
- 1900s1900190119021903190419051906190719081909
Nearby
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.