engleski

Some indicators of seismic activity in the caves of the Dinaric Karst of Croatia

The Dinaric karst is located in a seismically very active area. It is the area of contact between the African geotectonic plate and the Eurasian tectonic plate. The Adriatic plate is the northernmost part of the African plate. In the area of the Adriatic Sea, it subducts under the Dinarides. With such displacement of large tectonic plates, strong earthquakes are a common occurrence. Traces of seismotectonics were discovered in some caves. These traces indicate the possible intensity of the earthquakes from the time when seismology did not exist. Recent measurements of the absolute displacements of parts of the speleothem or even parts of cave channels within the last fifty years may have provided additional information on seismic activity. Special attention was paid to the construction of tunnels, bridges, dams and roads when traces of neotectonic movements were noticed inside the discovered caverns. Examples of the effects of recent earthquakesin some cavernsfound in tunnels during construction are given. Changes in the movement and amount of groundwater in these places were detected. Such observations significantly help in creating a more realistic interpretation of speleogenesis in certain karst areas within the Dinarides.

Speleology, Caves, seismic activity, Croatia

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