Mała epoka lodowa a sejsmiczność Karpat

Abstract

SEISMIC ACTIVITY OF THE CARPATHIANS AND ITS RELATION TO THE LITTLE ICE EPOCH Summary Cumulative magitudes of the Carpathian historical earthquakes have been calculated and compared with those of the Eastern Alps and extra-Carpathian Poland. The diagrams presented (Figs. 1,2) display two or three distinct episodes of a rapid increase in the seismic energy release, coinciding with the second half of the 19th and the beginning of the 20th century. As far as the Carpathians and Eastern Alps are concerned, a rapid increase in the earthquake magnitude growth (1850-1860) can be associated with final stages of the Little Ice Epoch. Another episode of seismic activity at the turn of the 19th and 20th centuries may have been related to both the glacioisostatic movements and remarkable changes in the Earth's rate of rotation, correlating as well with a distinct geomagnetic shift in the northern hemisphere [4], seismic energy release in Scandinavia [1], and a rapid drop in tectonic uplift rates of the Bothnian region [11, 12]. It seems that this episode made its occurrence not only within the stable Precambrian (Scandinavia) and Palaeozoic (Poland) platforms, but also in young Alpine orogens.