Idaho earthquakes in 1977
12 earthquakes of magnitude 2.5 or more were located in Idaho in 1977. The largest: M4.2 19 km WNW of Cascade, Idaho, Nov 27, 1977.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1977 was located in Idaho. Select one for its page.
Every quake of 1977
Magnitude 2.5 and up, newest first.
- 4.219 km WNW of Cascade, Idaho · 5 km deep
- 3.025 km ENE of Spencer, Idaho · 5 km deep
- 3.228 km NW of Challis, Idaho · 5 km deep
- 3.1southern Idaho · 5 km deep
- 3.334 km WNW of Challis, Idaho · 5 km deep
- 3.036 km WNW of Freedom, Idaho · 7 km deep
- 3.24 km W of Island Park, Idaho · 5 km deep
- 2.913 km NNW of Georgetown, Idaho · 5 km deep
- 3.117 km N of Clayton, Idaho · 5 km deep
- 3.213 km SSE of Island Park, Idaho · 12 km deep
- 2.96 km N of Tetonia, Idaho · 5 km deep
- 3.50 km SSW of Lima, Montana · 5 km deep
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1977 | 1 | 3.5 | 0 km SSW of Lima, Montana |
| February 1977 | 0 | ||
| March 1977 | 2 | 3.2 | 13 km SSE of Island Park, Idaho |
| April 1977 | 0 | ||
| May 1977 | 3 | 3.2 | 4 km W of Island Park, Idaho |
| June 1977 | 1 | 3.0 | 36 km WNW of Freedom, Idaho |
| July 1977 | 0 | ||
| August 1977 | 3 | 3.3 | 34 km WNW of Challis, Idaho |
| September 1977 | 1 | 3.0 | 25 km ENE of Spencer, Idaho |
| October 1977 | 0 | ||
| November 1977 | 1 | 4.2 | 19 km WNW of Cascade, Idaho |
| December 1977 | 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.