Slovenia has experienced 38 earthquakes so far in 2018, with most below 3 on the Richter (ML) scale, that figure being exceeded only twice.
First on January 17th, when a 3.8 quake hit the north west of the county, not far from Čezsoča, at a depth of 5 km. Second today, December 5, when at 17:23 a 3.4 magnitude quake struck just outside of Knežak, near Postojna, at a depth of 14 km, and felt at least 44 km away, in Ljubljana.
By coincidence, Dnvenik reported today that a study has concluded more than 41,000 homes in Ljubljana, with around 86,000 residents, were developed before the 1963 Skopje earthquake (6.1 ML) that led to the introduction of tougher standards, and thus could be at risk of significant damage if a similar quake occurred.
If you’d like to keep up-to-date with the latest in seismic activity as it relates to Slovenia, there’s the government website (in Slovene) here, while an international site, in English and searchable by location, is here.