Saint Helena earthquakes in 1981
14 earthquakes of magnitude 4.5 or more were located in Saint Helena in 1981. The largest: M5.6 Ascension Island region, Feb 16, 1981.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1981 was located in Saint Helena. Select one for its page.
Every quake of 1981
Magnitude 4.5 and up, newest first.
- 5.2Tristan da Cunha region · 10 km deep
- 4.9north of Ascension Island · 10 km deep
- 4.7north of Ascension Island · 10 km deep
- 4.7north of Ascension Island · 10 km deep
- 5.5north of Ascension Island · 10 km deep
- 4.5278 km ENE of Georgetown, Saint Helena · 10 km deep
- 5.3231 km ENE of Georgetown, Saint Helena · 10 km deep
- 4.9100 km ENE of Georgetown, Saint Helena · 10 km deep
- 4.6Ascension Island region · 10 km deep
- 5.4Tristan da Cunha region · 10 km deep
- 4.7Tristan da Cunha region · 10 km deep
- 4.9north of Ascension Island · 10 km deep
- 4.5Ascension Island region · 10 km deep
- 5.6Ascension Island region · 10 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1981 | 0 | ||
| February 1981 | 2 | 5.6 | Ascension Island region |
| March 1981 | 0 | ||
| April 1981 | 1 | 4.9 | north of Ascension Island |
| May 1981 | 0 | ||
| June 1981 | 1 | 4.7 | Tristan da Cunha region |
| July 1981 | 1 | 5.4 | Tristan da Cunha region |
| August 1981 | 4 | 5.3 | 231 km ENE of Georgetown, Saint Helena |
| September 1981 | 0 | ||
| October 1981 | 3 | 5.5 | north of Ascension Island |
| November 1981 | 1 | 4.9 | north of Ascension Island |
| December 1981 | 1 | 5.2 | Tristan da Cunha 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.
- 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.