The earthquake hit in southern Slovenia, around 40km east of the Italian city of Trieste, according to data published by the European-Mediterranean Seismological Centre (EMSC).
There were no immediate reports of injuries, with local journalist Beniamino Pagliaro tweeting that “everything is ok, in any case, for the moment”.
— Beniamino Pagliaro (@bpagliaro) April 22, 2014
Other users of the social media site in Trieste said the earthquake was “brief, but intense” and “horrible for a few moments!”, while some tweeted about panic and fear in the north-east.
Earlier this month a 5.19-magnitude earthquake which hit France was felt across the border in north-west Italy, sparking panic among some residents.