Građevinar, Vol. 78 No. 05., 2026.
Izvorni znanstveni članak
https://doi.org/10.14256/JCE.4445.2025
Monitoring seismic activity following 2020 Petrinja earthquake
Josip Stipčević
Krešimir Kuk
Iva Dasović
Dinko Šindija
Kristina Šariri
Marin Sečanj
Davorka Herak
Marijan Herak
Sažetak
The series of earthquakes in the Petrinja area began on Monday, 28 December 2020, at 6:28 a.m. local time (CET), with an earthquake of magnitude ML = 5.1 (MW = 4.9), which was felt across most of central Croatia. Its epicentre was southwest of Petrinja, near Strašnik village. This was soon followed by earthquakes of local magnitude 4.6, 7:49 a.m. and magnitude 3.8 at 7:51 a.m. in the same epicentral area, as well as a series of weaker earthquakes. Unfortunately, these relatively strong earthquakes proved to be just foreshocks, as an even stronger earthquake of local magnitude 6.2 (MW = 6.4) occurred the next day, 29 December 2020, at 12:19 p.m., also with an epicentre near Strašnik. The cornerstone of this study is the vast amount of seismological data collected. We used both manual and advanced machine learning techniques to analyse the newly collected dataset. This resulted in a substantially expanded seismic catalogue with over 50,000 events. Seismicity analysis confirms that the largest events align with the primary dextral strike-slip Petrinja Fault; however, the aftershock pattern evolved, revealing that stress redistribution activated numerous secondary faults, leading to a complex spatial and temporal distribution of seismicity. The findings provide a detailed seismological record and crucial insights into the tectonic processes of this intraplate region.
Ključne riječi
Petrinja; earthquake; aftershock; seismic network; machine learning
Hrčak ID:
349943
URI
Datum izdavanja:
23.6.2026.
Posjeta: 6 *