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Seismotectonic activity of western Croatia (CROSBI ID 749822)

Druge vrste radova | ostalo

Prelogović, Eduard ; Kuk, Vlado ; Tomljenović, Bruno Seismotectonic activity of western Croatia // Seismotectonic seminar, Geocenter Vienna, May, 12th 1998. 1998.

Podaci o odgovornosti

Prelogović, Eduard ; Kuk, Vlado ; Tomljenović, Bruno

engleski

Seismotectonic activity of western Croatia

Frequent earthquake occurrences within the area of the western Croatia speak for recently intensive seismotectonic activity related to this part of the Europe. Characteristically, earthquakes concentrate along the marginal parts of the Dinarides, especially from Rijeka to Furlania and less frequently between Karlovac and Ljubljana. Particularly high occurrence rates are recorded for the area located to the northwest of capital of Zagreb. The highest, 6.3 magnitude earthquake occurred at Medvednica Mt. in 1880. Seismotectonic activity originates as a consequence of Adriatic microplate movements relative to the Alps and the Dinarides. Data on recent regional stress show marked compression in the area of the Southern Alps and marginal parts of the Dinarides. Consequently, reverse and dextral strike-slip movements of geological structures along transcurrent faults predominate delineating several regional fault zones. The most active are Ilirska Bistrica - Rijeka, Ljubljana - Karlovac and Periadriatic - Drava fault zones. The area lying to the northwest of Zagreb is sandwiched between the Dinarides, the Southern and the Eastern Alps and represents the terrain recently undergoing active transpression. Neotectonic structures and structural elements observed within are generally in agreement to the N-S orientation of the regional compressive stress. Close to the terrain margins the stress shifts to the NNW-SSE orientation. Seismotectonic activity is predominantly concentrated along the Medvednica fault zone. Earthquake hypocentre distribution corresponds with locations of particular fault zones. Earthquake sources are separated and supplemented by data on estimated maximal earthquake magnitudes. Data on spatial arrangement and type of deformational structures composing the recent tectonic macrofabric, as well as those on tectonic movements and earthquakes, enable construction of adequate seismotectonic profiles for the most active fault zones that contribute to a better understanding of seismotectonic model.

marginal part; Dinarides; NW of Zagreb transcurrent faults; compressive stress; Adriatic microplate

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Podaci o izdanju

Seismotectonic seminar, Geocenter Vienna, May, 12th 1998

1998.

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objavljeno

Povezanost rada

Geologija, Rudarstvo, nafta i geološko inženjerstvo