Geofizika, Vol. 35 No. 1, 2018.
Original scientific paper
https://doi.org/10.15233/gfz.2018.35.2
Seismicity of Croatia in the period 2006–2015
Ines Ivančić
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Davorka Herak
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Marijan Herak
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Ivo Allegretti
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Tomislav Fiket
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Krešimir Kuk
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Snježana Markušić
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Snježan Prevolnik
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Ivica Sović
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Iva Dasović
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Josip Stipčević
; Department of Geophysics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Abstract
During the ten-year period from 2006 to 2015 a total of 36 733 earthquakes were located in Croatia and its surrounding areas, with 37 main events registering magnitudes from 4.0 to 4.9. Seismically the most active was the coastal part of Croatia confined to two seismically distinguished areas. The NW domain was seismically less active, with almost 10000 located events (seven were of magnitude ML ≥ 4.0), among which were the three strongest events that occurred in Croatia during the observed period. Two of them occurred in the Senj picentral area, the first one on 5 February 2007 at 8:30 UTC (ML = 4.9, Imax = VII °MSK) and the second one on 30 July 2013 at 12:58 UTC, (ML = 4.8, Imax = VI °MSK). The third event occurred near Kornati Islands on 18 July 2007 at 10:54 UTC (ML = 4.8). The SE domain experienced the highest number of earthquakes (over 19 000 located events, with 24 events of magnitude ML ≥ 4.0, among which the strongest one was of magnitude ML = 4.9 with the epicentre in Bosnia and Herzegovina near the Croatian border). The seismicity in the continental part of Croatia was weak-to-moderate, with earthquakes of magnitudes ML ≤ 4.1. Focal mechanisms were obtained for 31 earthquakes with magnitudes ML ≥ 4.0, and individual earthquakes have also been macroseismically analysed. Low current moment release rates for both regions (continental and coastal) as compared to long-term averages, indicate the regions are currently in the strain accumulation phase.
Keywords
seismicity; Croatia; fault-plane solutions; earthquake catalogue; macroseismic maps
Hrčak ID:
204080
URI
Publication date:
30.6.2018.
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