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 three earthquakes , one of 5.4 magnitude on the Richter scale at 6.24 AM , CET and the other two of 5.0 and 3.7 magnitudes respectively during the 2020 coronavirus pandemic in Croatia .