Transylvania as originally defined in Treaty of Trianon, 27 years earlier, thus confirming the return of Northern Transylvania to Romania. From 1947 to 1989, Transylvania, along with the rest of Romania, was under a communist regime. The ethnic clashes of Târgu Mureș occurred between ethnic Romanians and Hungarians in March 1990 after the fall of the communist regime and became most notable inter-ethnic incident in the post-communist era. The Transylvanian Plateau, high, is drained by the Mureș, Someș, Criș, and Olt rivers, as well as other tributaries of the Danube. This core of historical Transylvania roughly corresponds with nine counties of
Electrica Transylvania North Electrica Transylvania North Electrica North Transylvania is a Romanian company that distributes and supplies electric power for 1,089,192 customers in Cluj, Bihor, Maramureş, Satu Mare, Salaj and Bistriţa-Năsăud. Electrica North Transylvania with its headquarters in Cluj-Napoca, unfolds its activity in an area of 34,160 km². The Electricity Supply and Distribution Branch North Transylvania sold, in 2002, over 3,845,622 MWh, a sales level that ranges it among the first at the national level from this point of view. Electrica North Transylvania administrates 39,996 km of electric lines – aerial and subterraneous, 90 transformation stations and 7,535 supply units and transformation stations.