Tonga earthquakes in 1971
21 earthquakes of magnitude 4.5 or more were located in Tonga in 1971. The largest: M6.3 225 km SSW of ‘Ohonua, Tonga, Mar 23, 1971.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1971 was located in Tonga. Select one for its page.
Every quake of 1971
Magnitude 4.5 and up, newest first.
- 5.7200 km WNW of Hihifo, Tonga · 35 km deep
- 5.9143 km W of Pangai, Tonga · 221 km deep
- 5.8154 km NE of Neiafu, Tonga · 15 km deep
- 5.782 km N of Hihifo, Tonga · 80 km deep
- 6.072 km SSE of Pangai, Tonga · 21 km deep
- 5.2129 km ENE of Hihifo, Tonga · 29 km deep
- 5.6south of Tonga · 15 km deep
- 5.574 km WSW of Neiafu, Tonga · 145 km deep
- 5.595 km SSE of Pangai, Tonga · 39 km deep
- 5.672 km NE of Hihifo, Tonga · 15 km deep
- 5.7163 km NE of Neiafu, Tonga · 15 km deep
- 5.1182 km SE of Hihifo, Tonga · 15 km deep
- 5.3153 km NE of Neiafu, Tonga · 25 km deep
- 5.51 km ESE of Hihifo, Tonga · 100 km deep
- 5.7south of Tonga · 27 km deep
- 5.0125 km ESE of Hihifo, Tonga · 15 km deep
- 5.6south of Tonga · 15 km deep
- 5.7114 km ENE of Hihifo, Tonga · 15 km deep
- 6.3225 km SSW of ‘Ohonua, Tonga · 73 km deep
- 5.6165 km NE of Neiafu, Tonga · 15 km deep
- 5.625 km WSW of Haveluloto, Tonga · 85 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1971 | 0 | ||
| February 1971 | 1 | 5.6 | 25 km WSW of Haveluloto, Tonga |
| March 1971 | 4 | 6.3 | 225 km SSW of ‘Ohonua, Tonga |
| April 1971 | 3 | 5.7 | south of Tonga |
| May 1971 | 0 | ||
| June 1971 | 0 | ||
| July 1971 | 3 | 5.7 | 163 km NE of Neiafu, Tonga |
| August 1971 | 3 | 5.6 | 72 km NE of Hihifo, Tonga |
| September 1971 | 3 | 6.0 | 72 km SSE of Pangai, Tonga |
| October 1971 | 1 | 5.7 | 82 km N of Hihifo, Tonga |
| November 1971 | 1 | 5.8 | 154 km NE of Neiafu, Tonga |
| December 1971 | 2 | 5.9 | 143 km W of Pangai, Tonga |
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.