During military activity at STS, many chemical explosions were carried out for construction and for engineering and scientific purposes. Some of them have been wrongly listed as UNTs in western publications.
29 chemical explosions at the STS during 1961-1989 which
were detected and located from regional observations in our published study
| Date | Time | lat. N | long. E | K | m(NOR) | mb(K) | Notes |
| 1961 Jun 05 | 03:50:00 | 49.77 | 77.98 | 11.0 | - | 4.42 | A |
| 1973 Mar 23 | 06:30:00 | 49.94 | 79.06 | 9.53 | 3.7 | 3.74 | |
| 1974 Sep 27 | 07:34:00 | 49.98 | 79.00 | 10.47 | 4.0 | 4.16 | |
| 1978 Jul 31 | 08:00:00 | 50.42 | 77.87 | 10.2 | 3.9 | 4.05 | B |
| 1979 May 24 | 04:07:00 | 49.94 | 78.79 | 10.33 | 3.9 | 4.05 | C |
| 1979 Sep 14 | 07:33:00 | 49.95 | 78.84 | 10.75 | 4.4 | 4.30 | C |
| 1979 Sep 15 | 04:07:00 | 49.94 | 78.82 | 8.85 | 3.8 | 3.44 | |
| 1980 Jul 13 | 08:10:00 | 49.91 | 78.84 | 10.33 | - | 4.10 | C |
| 1980 Sep 20 | 10:40:01 | 49.96 | 78.88 | 9.83 | 3.8 | 3.88 | C |
| 1980 Sep 30 | 05:57:12 | 49.95 | 78.40 | - | 3.6 | - | C |
| 1980 Sep 30 | 05:57:17 | 49.95 | 78.40 | 11.03 | 4.4 | 4.42 | C |
| 1980 Nov 06 | 17:42:58 | 50.14 | 78.76 | 9.17 | 3.9 | 3.56 | |
| 1981 May 28 | 04:08:28 | 50.00 | 78.00 | 7.70 | - | 2.90 | |
| 1981 Jun 05 | 03:22:18 | 49.84 | 78.72 | 10.30 | 4.0 | 4.10 | C |
| 1981 Jul 05 | 03:59:14 | 49.87 | 78.99 | 10.47 | - | 4.17 | C |
| 1981 Sep 30 | 12:55:10 | 49.94 | 78.90 | 10.70 | 4.3 | 4.28 | C |
| 1981 Nov 19 | 05:57:14 | 50.11 | 78.95 | 9.60 | 4.0 | 3.78 | |
| 1982 Jun 11 | 10:59:07 | 49.90 | 77.90 | 10.65 | 4.1 | 4.26 | C |
| 1982 Jul 12 | 10:29:18 | 49.90 | 77.90 | 10.67 | 3.9 | 4.27 | C |
| 1982 Sep 04 | 05:47:17 | 50.06 | 78.56 | 9.47 | 3.6 | 3.72 | C |
| 1982 Sep 15 | 04:33:19 | 49.85 | 78.85 | 10.86 | 4.2 | 4.36 | C |
| 1983 Jul 28 | 03:41:28 | 50.07 | 78.60 | 10.74 | 4.3 | 4.34 | C |
| 1984 Jun 23 | 02:57:16 | 49.92 | 78.93 | 11.06 | 4.4 | 4.44 | C |
| 1984 Sep 15 | 06:15:10 | 49.99 | 78.88 | 11.17 | - | 4.48 | C |
| 1985 Jun 27 | 11:57:04 | 49.78 | 77.97 | 8.5 | - | 3.27 | D |
| 1987 Jun 29 | 04:55:08 | 49.78 | 77.97 | 8.5 | - | 3.27 | D |
| 1987 Sep 02 | 09:27:05 | 50.00 | 70.34 | - | 2.7 | - | E |
| 1987 Sep 16 | 07:30:01 | 49.86 | 78.73 | 10.64 | 4.3 | 4.26 | C |
| 1988 Sep 26 | 07:45:04 | 50.08 | 78.80 | 10.41 | 4.3 | 4.15 | C |
m(NOR) refers to magnitudes reported by F. Ringdal [1994]
mb(K) is the body wave magnitude mb calculated from energy class K
using a relationship established by Khalturin et al. (1998): mb(K) = 0.46 K - 0.64.
Notes:
A - Fully contained explosion with a yield of 600 tons, carried
out prior to the start of nuclear testing [Adushkin et al., 1995].
B - Chemical explosion on the surface with a yield of 5000 tons.
C - These chemical explosions have been wrongly listed in some
early papers as an underground nuclear test.
D - These two experimental chemical explosions, each of 500 tons,
were conducted on the surface of Degelen Mountain near the
mouth of tunnel #16 (49.7841 N, 77.96722 E).
E - Chemical explosion (yield 20 tons, depth 25 m) carried out
during the Joint US-Soviet Experiment (the Natural Resources Defense Council and the Soviet Academy of Sciences).
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