GLACIAL CATASTROPHE OF 20 SEPTEMBER 2002 IN NORTH OSETIA
Рубрики: ОРИГИНАЛЬНЫЕ СТАТЬИ
Авторы:
1.
"Sevosgeologorazvedka" Company, Vladikavkaz, North Osetia, Russia
Тип:
Статья
Страницы:
с 1
по 25
Статус:
Опубликован
Получено:
25.08.2006
Одобрено:
25.08.2006
Опубликовано:
25.08.2006
Язык материала:
английский
Ключевые слова:
mountain glaciers, firn massifs, avalanches, landslides, earthquakes.
Аннотация (русский):
The aim of this study was to reconstruct the main parameters of the catastrophe, using the data obtained as a result of instrumental measurements. The parameters of the catastrophe were estimated, and the volumes of the collapsed firn massif and body of the Kolka Glacier were calculated. Also reported in this paper are the results of the topographic monitoring of the glacier barrier in the Karmadon Basin. Using the seismic records available, the speed of the glacier demolition down the Genaldon Ravine was calculated. It is assumed that the main cause that had initiated the beginning of the catastrophic process was the seismic effect resulting in the origin of fumarolic emanations under the firn field in July 2002 (two months before the catastrophe) and its gradual destruction in the course of termocarst development.
The aim of this study was to reconstruct the main parameters of the catastrophe, using the data obtained as a result of instrumental measurements. The parameters of the catastrophe were estimated, and the volumes of the collapsed firn massif and body of the Kolka Glacier were calculated. Also reported in this paper are the results of the topographic monitoring of the glacier barrier in the Karmadon Basin. Using the seismic records available, the speed of the glacier demolition down the Genaldon Ravine was calculated. It is assumed that the main cause that had initiated the beginning of the catastrophic process was the seismic effect resulting in the origin of fumarolic emanations under the firn field in July 2002 (two months before the catastrophe) and its gradual destruction in the course of termocarst development.
Ключевые слова:
mountain glaciers, firn massifs, avalanches, landslides, earthquakes.
mountain glaciers, firn massifs, avalanches, landslides, earthquakes.
1. Rogozhin, The Geodynamics, Seismotectonics, and Volcanism of the North Caucasus Region, edited N. P. Laverov, 2001.
2. Rototaev, Proc. Glaciological Studies, v. 24, 1974.
3. Savich, Estimation of Seismic Danger for the Zaromag Hydroelectrostation, RAO "Electric Stations of Russia", 1996.
4. Teplyakova, The main stages of the topographic and recent structural evolution of the Gornaya Osetia territory, 1984.
