Saint Helena earthquakes in 1979
7 earthquakes of magnitude 4.5 or more were located in Saint Helena in 1979. The largest: M5.6 north of Ascension Island, Feb 22, 1979.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1979 was located in Saint Helena. Select one for its page.
Every quake of 1979
Magnitude 4.5 and up, newest first.
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1979 | 0 | ||
| February 1979 | 1 | 5.6 | north of Ascension Island |
| March 1979 | 2 | 5.0 | Ascension Island region |
| April 1979 | 0 | ||
| May 1979 | 1 | 4.6 | Ascension Island region |
| June 1979 | 0 | ||
| July 1979 | 1 | 4.6 | north of Ascension Island |
| August 1979 | 0 | ||
| September 1979 | 0 | ||
| October 1979 | 1 | 4.8 | north of Ascension Island |
| November 1979 | 0 | ||
| December 1979 | 1 | 5.1 | 238 km ENE of Georgetown, Saint Helena |
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.