| 1405-11-23 | 58.8 | 36.3 | 7.2 | 30000 | NORTHEASTERN IRAN |
| 1667-11-18 | 57.5 | 37.2 | 6.9 | 12000 | TURKMENISTAN-IRAN BORDER REGION |
| 1673-07-30 | 59.3 | 36.4 | 7.1 | 5600 | NORTHEASTERN IRAN |
| 1695-05-11 | 57.5 | 37.1 | 7.0 | 360 | TURKMENISTAN-IRAN BORDER REGION |
| 1851-06-00 | 58.5 | 36.8 | 6.9 | 2000 | NORTHEASTERN IRAN |
| 1852-02-22 | 58.4 | 37.1 | 5.8 | 2000 | TURKMENISTAN-IRAN BORDER REGION |
| 1871-12-23 | 58.4 | 37.4 | 7.2 | 2000 | TURKMENISTAN-IRAN BORDER REGION |
| 1872-01-06 | 58.4 | 37.1 | 6.3 | 4000 | TURKMENISTAN-IRAN BORDER REGION |
| 1879-04-02 | 57.4 | 37.5 | 6.7 | 700 | TURKMENISTAN-IRAN BORDER REGION |
| 1890-06-28 | 59.4 | 36.2 | ? | many | NORTHEASTERN IRAN |
| 1893-11-17 | 58.4 | 37.1 | 7.1 | 10000 | TURKMENISTAN-IRAN BORDER REGION |
| 1895-01-17 | 58.4 | 37.1 | 6.8 | 1000 | TURKMENISTAN-IRAN BORDER REGION |
| 1923-09-17 | 57.5 | 37.9 | 6.4 | 157 | TURKMENISTAN-IRAN BORDER REGION |
| 1929-05-01 | 57.8 | 37.8 | 7.2 | 3257 | TURKMENISTAN-IRAN BORDER REGION |
| 1948-10-05 | 58.7 | 37.7 | 7.3 | 19800 | TURKMENISTAN-IRAN BORDER REGION |
| 1969-01-03 | 57.8 | 37.2 | 5.4 | 50 | TURKMENISTAN-IRAN BORDER REGION |
| 1970-07-30 | 55.9 | 37.9 | 6.7 | 220 | TURKMENISTAN-IRAN BORDER REGION |
| 1997-02-04 | 57.3 | 37.7 | 6.8 | 100 | TURKMENISTAN-IRAN BORDER REGION |
| 2017-05-13 | 57.3 | 37.7 | 5.6 | 3 | NORTHEASTERN IRAN |
Testimonies, photos
Geophysical Survey of the Russian Academy of Sciences -- Obninsk, Russia (GSRC)
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