Alaska earthquakes in 1921
1 earthquake of magnitude 2.5 or more was located in Alaska in 1921. The largest: M6.2 296 km SSW of Hydaburg, Alaska, Apr 10, 1921.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1921 was located in Alaska. Select one for its page.
Every quake of 1921
Magnitude 2.5 and up, newest first.
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 | 0 | ||
| April 1921 | 1 | 6.2 | 296 km SSW of Hydaburg, Alaska |
| May 1921 | 0 | ||
| June 1921 | 0 | ||
| July 1921 | 0 | ||
| August 1921 | 0 | ||
| September 1921 | 0 | ||
| October 1921 | 0 | ||
| November 1921 | 0 | ||
| December 1921 | 0 |
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.