№ 2,
2009
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Analysis of earthquake focal mechanisms for Greater and Lesser Caucasus applying the method of world stress map
Institute of Geology and Geophysics of Azerbaijan National Academy of Sciences, AZ1143, Baku, H.Javid av., 119
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For investigating the present-day stress pattern, the results of focal mechanism were re-analyzed. An update stress map of the Greater and Lesser Caucasus is introduced, plotted by applying a modern method of determining orientation of main stresses. With WSM technique, 226 focal mechanisms within the period of 1953-2000 years were grouped and tectonic regime for each event was determined by applying the WSM quality ranking. The visualised results confirmed the type of the stress state-the compression stresses, acting in horizontal plane across to the extension of the structures of General Caucasus direction. It was also evidenced that in the North, the stresses are approximately normally-oriented to the mountain chain of the Greater and Lesser Caucasus.