CHEMICAL EXPLOSIONS CARRIED OUT AT STS DURING 1961-1988



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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