Puerto Rico earthquakes in 1974
7 earthquakes of magnitude 2.5 or more were located in Puerto Rico in 1974. The largest: M4.9 49 km N of Isabela, Puerto Rico, Jun 21, 1974.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1974 was located in Puerto Rico. Select one for its page.
Every quake of 1974
Magnitude 2.5 and up, newest first.
- 4.71 km NE of Vega Alta, Puerto Rico · 93 km deep
- 4.630 km S of Esperanza, Puerto Rico · 33 km deep
- 4.949 km N of Isabela, Puerto Rico · 46 km deep
- 4.390 km N of Tierras Nuevas Poniente, Puerto Rico · 46 km deep
- 4.242 km NW of Rincón, Puerto Rico · 88 km deep
- 4.31 km ENE of Aceitunas, Puerto Rico · 96 km deep
- 4.2Puerto Rico region · 33 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1974 | 1 | 4.2 | Puerto Rico region |
| February 1974 | 0 | ||
| March 1974 | 1 | 4.3 | 1 km ENE of Aceitunas, Puerto Rico |
| April 1974 | 1 | 4.2 | 42 km NW of Rincón, Puerto Rico |
| May 1974 | 1 | 4.3 | 90 km N of Tierras Nuevas Poniente, Puerto Rico |
| June 1974 | 1 | 4.9 | 49 km N of Isabela, Puerto Rico |
| July 1974 | 0 | ||
| August 1974 | 1 | 4.6 | 30 km S of Esperanza, Puerto Rico |
| September 1974 | 0 | ||
| October 1974 | 1 | 4.7 | 1 km NE of Vega Alta, Puerto Rico |
| November 1974 | 0 | ||
| December 1974 | 0 |
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.