Saint Helena earthquakes in 1983
16 earthquakes of magnitude 4.5 or more were located in Saint Helena in 1983. The largest: M5.1 123 km NE of Georgetown, Saint Helena, Nov 17, 1983.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1983 was located in Saint Helena. Select one for its page.
Every quake of 1983
Magnitude 4.5 and up, newest first.
- 5.0north of Ascension Island · 10 km deep
- 5.0north of Ascension Island · 10 km deep
- 5.1123 km NE of Georgetown, Saint Helena · 10 km deep
- 4.8106 km ENE of Georgetown, Saint Helena · 10 km deep
- 5.1202 km ENE of Georgetown, Saint Helena · 10 km deep
- 5.0north of Ascension Island · 10 km deep
- 4.7north of Ascension Island · 10 km deep
- 4.5113 km E of Georgetown, Saint Helena · 10 km deep
- 5.1north of Ascension Island · 10 km deep
- 4.9north of Ascension Island · 10 km deep
- 4.9Ascension Island region · 10 km deep
- 4.9north of Ascension Island · 10 km deep
- 4.7Ascension Island region · 10 km deep
- 4.9north of Ascension Island · 10 km deep
- 4.8Tristan da Cunha region · 10 km deep
- 5.1Ascension Island region · 10 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1983 | 2 | 5.1 | Ascension Island region |
| February 1983 | 1 | 4.9 | north of Ascension Island |
| March 1983 | 1 | 4.7 | Ascension Island region |
| April 1983 | 4 | 5.1 | north of Ascension Island |
| May 1983 | 1 | 4.5 | 113 km E of Georgetown, Saint Helena |
| June 1983 | 0 | ||
| July 1983 | 1 | 4.7 | north of Ascension Island |
| August 1983 | 0 | ||
| September 1983 | 3 | 5.1 | 202 km ENE of Georgetown, Saint Helena |
| October 1983 | 0 | ||
| November 1983 | 2 | 5.1 | 123 km NE of Georgetown, Saint Helena |
| December 1983 | 1 | 5.0 | north of Ascension Island |
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.