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Open AccessArticle

Destructive M6.2 Petrinja Earthquake (Croatia) in 2020—Preliminary Multidisciplinary Research

1
Department of Geophysics, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
2
Faculty of Geotechnical Engineering, University of Zagreb, 42000 Varaždin, Croatia
3
Faculty of Civil Engineering and Architecture Osijek, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
4
IGEA d.o.o., 42000 Varaždin, Croatia
5
Department of Geology, Croatian Geological Survey, 10000 Zagreb, Croatia
6
Faculty of Engineering and Physical Sciences, School of Civil Engineering, University of Leeds, Leeds LS2 9JT, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Fumio Yamazaki
Remote Sens. 2021, 13(6), 1095; https://doi.org/10.3390/rs13061095
Received: 9 February 2021 / Revised: 5 March 2021 / Accepted: 11 March 2021 / Published: 13 March 2021
(This article belongs to the Special Issue Earthquake Ground Motion Observation and Modelling)
On 28 December 2020, seismic activity in the wider Petrinja area strongly intensified after a period of relative seismological quiescence that had lasted more than 100 years (since the well-known M5.8 Kupa Valley earthquake of 1909, which is known based on the discovery of the Mohorovičić discontinuity). The day after the M5 foreshock, a destructive M6.2 mainshock occurred. Outcomes of preliminary seismological, geological and SAR image analyses indicate that the foreshocks, mainshock and aftershocks were generated due to the (re)activation of a complex fault system—the intersection of longitudinal NW–SE right-lateral and transverse NE–SW left-lateral faults along the transitional contact zone of the Dinarides and the Pannonian Basin. According to a survey of damage to buildings, approximately 15% of buildings were very heavily damaged or collapsed. Buildings of special or outstanding historical or cultural heritage significance mostly collapsed or became unserviceable. A preliminary analysis of the earthquake ground motion showed that in the epicentral area, the estimated peak ground acceleration PGA values for the bedrock ranged from 0.29 to 0.44 g. In the close Petrinja epicentral area that is characterized by the superficial deposits, significant ground failures were reported within local site effects. Based on that finding and building damage, we assume that the resulting peak ground acceleration (PGAsite) values were likely between 0.4 and 0.6 g depending on the local site characteristics and the distance from the epicentre. View Full-Text
Keywords: Petrinja earthquake; Dinarides; Pannonian basin; strike-slip faults; Kupa Valley (Pokupsko); SAR images; land displacement; building damage; local soil effects Petrinja earthquake; Dinarides; Pannonian basin; strike-slip faults; Kupa Valley (Pokupsko); SAR images; land displacement; building damage; local soil effects
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MDPI and ACS Style

Markušić, S.; Stanko, D.; Penava, D.; Ivančić, I.; Bjelotomić Oršulić, O.; Korbar, T.; Sarhosis, V. Destructive M6.2 Petrinja Earthquake (Croatia) in 2020—Preliminary Multidisciplinary Research. Remote Sens. 2021, 13, 1095. https://doi.org/10.3390/rs13061095

AMA Style

Markušić S, Stanko D, Penava D, Ivančić I, Bjelotomić Oršulić O, Korbar T, Sarhosis V. Destructive M6.2 Petrinja Earthquake (Croatia) in 2020—Preliminary Multidisciplinary Research. Remote Sensing. 2021; 13(6):1095. https://doi.org/10.3390/rs13061095

Chicago/Turabian Style

Markušić, Snježana; Stanko, Davor; Penava, Davorin; Ivančić, Ines; Bjelotomić Oršulić, Olga; Korbar, Tvrtko; Sarhosis, Vasilis. 2021. "Destructive M6.2 Petrinja Earthquake (Croatia) in 2020—Preliminary Multidisciplinary Research" Remote Sens. 13, no. 6: 1095. https://doi.org/10.3390/rs13061095

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