The 1978 Thessaloniki earthquake (Greek: Μεγάλος Σεισμός της Θεσσαλονίκης) occurred on 20 June at 23:03 local time, registering 6.5 on the moment magnitude scale and causing severe shaking (VIII on the Mercalli intensity scale). The earthquake affected Thessaloniki and surrounding villages, causing extensive damage, killing 45 people (including 38 from a collapsed eight-storey building in the city centre), and injuring between 100 and 220 others. It was the largest event in the area since the 1932 Ierissos earthquake, with tremors felt throughout northern Greece, Yugoslavia, and Bulgaria. The earthquake occurred along the Thessaloniki–Gerakarou Fault Zone and was preceded by significant foreshocks. The estimated damage ranged from $250 million to $1 billion (in 1978 dollars).
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