Publication report on grid incident in South-East Europe on 21 June 2024

25 February 2025

On Friday, 21 June 2024, a significant incident occurred in South-East Europe. This led to a major disruption in the power system of Continental Europe (CE) that resulted in a blackout in Albania (OST), Bosnia and Herzegovina (NOSBiH), Montenegro (CGES), and Croatia (HOPS).

According to the Incident Classification Scale (ICS) Methodology (developed in accordance with Regulation (EU) 2019/943), the incident was a scale 3 blackout and above the RCC investigation threshold. Thereby, an RCC investigation subgroup has been established according to the Regional Coordination Centre Post-Operation and Post-Disturbances Analysis and Reporting (RIAR) Methodology in accordance with Article 37 (1) (i) of the Regulation (EU) 2019/943.

The final report on the Balkan Black Out June 21st has now been published by RCCs and ENTSO-E. The report has been written by ENTSO-E, the ICS Expert Panel and the RCC investigation subgroup in close cooperation. The final report includes the sequence of events, the identified causes and recommendations to prevent future incidents.

Read the final report