PETRINJA (CROATIA), Dec. 30, 2020 (Xinhua) -- The aerial photo taken on Dec. 30, 2020 shows the earthquake-damaged city of Petrinja, Croatia. Powerful aftershocks continued to rock central Croatia on Wednesday, a day after a 6.4-magnitude earthquake devastated towns and villages about 50 kilometers southeast of the capital Zagreb, killing seven and injuring dozens. (Igor Kralj/Pixsell via Xinhua)