Earthquakes United States 1991
United States was hit by 239 earthquakes with a magnitude of 4 and more in 1991. The biggest earthquake in United States for 1991 had a magnitude of 7.1 (8/17/1991)
4.4
1991-04-08
4.4
1991-05-04
4.4
1991-05-18
4.4
1991-12-28
4.4
1991-08-25
4.4
1991-08-27
4.4
1991-09-04
4.4
1991-10-05
4.4
1991-09-19
4.4
1991-08-25
Earthquakes Map United States 1991
Earthquakes Chart United States 1991
| Month | Number of hits |
| January 1991 | 11 |
| February 1991 | 16 |
| March 1991 | 16 |
| April 1991 | 20 |
| May 1991 | 24 |
| June 1991 | 18 |
| July 1991 | 19 |
| August 1991 | 38 |
| September 1991 | 18 |
| October 1991 | 29 |
| November 1991 | 19 |
| December 1991 | 11 |