It is reported by the United States Geological Survey (USGS).

Tremors were recorded at 17:01 UTC (20:01 Moscow time).

The epicenter of tremors was located 6 km south-west of the city of Petrin.

The hearth was located at a depth of 10 km.

On December 29, seismologists recorded an earthquake of magnitude 6.3 in Croatia.

The Croatian government later officially declared January 2 a day of mourning for those killed in the tremors.