RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 8, ES4004, doi:10.2205/2006ES000207, 2006
![]() |
Figure 9 |
[18] This work revealed that on 14 July, 2002, the rock mass of the Dzhimarai-Hoh peak had experienced shaking of intencity 5.2 on the MSK-64 scale. The epicenter of this earthquake was located 8 km west of the Dzhimarai-Hoh peak. In the initial KMV-2002 data sample this earthquake has a number of 244. Its main parameters are: No. 244 (Md = 3.88; K = 9.8; depth = 5.4 km). The same day witnessed two earthquakes more: No. 245 (Md = 3.11, K = 8.3) and No. 246 (Md = 3.20, K = 8.4).
![]() |
Figure 10 |
![]() |
Figure 11 |
[20] (1) The shaking corresponding to magnitude 5, communicated to the Dzhimarai-Hoh pyramid from the earthquake no. 244, had the following parameters: the acceleration (a) of ~0.28 m sec-2, the displacement rate (v) of ~0.056 m sec -1, the absolute displacement (L) of ~0.04 m.
[21] (2) The effect of this intensity on the hanging firn fields of the "Kolka" glacial rock complex (the thickest and steeply dipping in the mountainous area discussed) can increase the momental value of their sliding down force almost by 9%, which will decrease their stability by the same value. Essentially, this effect can cause significant mechanical damages in the ice-firn massif and, eventually, its complete disintegration.
[22] Did the Dzhimarai-Hoh Massif experience any more powerful seismic effects during the previous 10-15 years? As follows from the data reported by Savich et al. [1996], the calculated shaking of the Dzhimarai-Hoh Massif from the Racha earthquake (MPSP = 6.6; 29.04.91) and from the Borisakh earthquake (MPSP = 6.6; 23.10.93) was as high as 5.6. No stronger seismic effects were recorded.
Citation: 2006), Glacial catastrophe of 20 September 2002 in North Osetia, Russ. J. Earth Sci., 8, ES4004, doi:10.2205/2006ES000207.
Copyright 2006 by the Russian Journal of Earth Sciences (Powered by TeXWeb (Win32, v.2.0).