Oklahoma earthquakes in 1987
6 earthquakes of magnitude 2.5 or more were located in Oklahoma in 1987. The largest: M3.7 12 km NE of Loyal, Oklahoma, Dec 7, 1987.
From the USGS catalog. Times are local to each quake.
Map
Where every quake of 1987 was located in Oklahoma. Select one for its page.
Every quake of 1987
Magnitude 2.5 and up, newest first.
Month by month
Counted by UTC date, which is how the catalog files them.
| Month | Quakes | Largest | Where |
|---|---|---|---|
| January 1987 | 1 | 3.1 | 15 km WSW of Kingfisher, Oklahoma |
| February 1987 | 0 | ||
| March 1987 | 1 | 2.8 | 6 km SW of Gerty, Oklahoma |
| April 1987 | 0 | ||
| May 1987 | 0 | ||
| June 1987 | 1 | 2.9 | 1 km ESE of Elmore City, Oklahoma |
| July 1987 | 0 | ||
| August 1987 | 0 | ||
| September 1987 | 0 | ||
| October 1987 | 0 | ||
| November 1987 | 0 | ||
| December 1987 | 3 | 3.7 | 12 km NE of Loyal, Oklahoma |
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.
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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.