On 22 March , an intense earthquake ( 5.4 on the Richter scale ) hit the city of Zagreb , at 6:24 AM ( CET ) and was followed by multiple smaller earthquakes ( the second with a magnitude of 5.0 and third a 3.7 on the Richter scale ) .
Zagreb witnessed an earthquake of 5.4 magnitude on the Richter scale at 6.24 AM , followed by multiple aftershocks with the largest at 7.01 AM during the 2020 coronavirus pandemic in Croatia .