Earthquakes United States 1981
United States was hit by 287 earthquakes with a magnitude of 4 and more in 1981. The biggest earthquake in United States for 1981 had a magnitude of 6.4 (11/3/1981)
4.1
1981-06-22
4.1
1981-04-15
4.1
1981-04-30
4.1
1981-05-13
4.1
1981-01-12
4.1
1981-01-18
4.1
1981-01-27
4.1
1981-01-22
4.1
1981-02-11
4.1
1981-02-19
Earthquakes Map United States 1981
Earthquakes Chart United States 1981
| Month | Number of hits |
| January 1981 | 32 |
| February 1981 | 16 |
| March 1981 | 21 |
| April 1981 | 32 |
| May 1981 | 19 |
| June 1981 | 23 |
| July 1981 | 29 |
| August 1981 | 16 |
| September 1981 | 27 |
| October 1981 | 27 |
| November 1981 | 26 |
| December 1981 | 19 |