Saint Helena earthquakes in 1974
14 earthquakes of magnitude 4.5 or more were located in Saint Helena in 1974. The largest: M5.3 north of Ascension Island, Jan 6, 1974.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1974 was located in Saint Helena. Select one for its page.
Every quake of 1974
Magnitude 4.5 and up, newest first.
- 4.9101 km ENE of Georgetown, Saint Helena · 33 km deep
- 4.8north of Ascension Island · 33 km deep
- 5.1north of Ascension Island · 33 km deep
- 4.7north of Ascension Island · 24 km deep
- 4.8297 km SSE of Georgetown, Saint Helena · 33 km deep
- 5.0north of Ascension Island · 33 km deep
- 4.7Ascension Island region · 33 km deep
- 5.2Ascension Island region · 33 km deep
- 5.1Ascension Island region · 33 km deep
- 5.0Ascension Island region · 33 km deep
- 4.9north of Ascension Island · 33 km deep
- 4.6north of Ascension Island · 33 km deep
- 4.7north of Ascension Island · 33 km deep
- 5.3north of Ascension Island · 33 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1974 | 2 | 5.3 | north of Ascension Island |
| February 1974 | 4 | 5.1 | Ascension Island region |
| March 1974 | 1 | 5.2 | Ascension Island region |
| April 1974 | 0 | ||
| May 1974 | 0 | ||
| June 1974 | 0 | ||
| July 1974 | 0 | ||
| August 1974 | 2 | 5.0 | north of Ascension Island |
| September 1974 | 1 | 4.8 | 297 km SSE of Georgetown, Saint Helena |
| October 1974 | 3 | 5.1 | north of Ascension Island |
| November 1974 | 0 | ||
| December 1974 | 1 | 4.9 | 101 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.