1978 Thessaloniki earthquake

The 1978 Thessaloniki earthquake (Greek: Μεγάλος Σεισμός της Θεσσαλονίκης) occurred on 20 June at 23:03 local time. The shock registered 6.5 on the moment magnitude scale, had a maximum Mercalli intensity of VIII (Severe), and was felt throughout northern Greece, Yugoslavia and Bulgaria. It was the largest event in the area since the 1932 Ierissos earthquake.[4]

1978 Thessaloniki earthquake

Thessaloniki Athens
UTC time	1978-06-20 20:03
ISC event	681154
USGS-ANSS	ComCat
Local date	20 June 1978 (1978-06-20)
Local time	23:03
Magnitude	6.2 Mw [1]
Depth	16.0 km (9.9 mi)
Epicenter	40.6°N 23.3°E / 40.6; 23.3 [1]
Type	Normal[2]
Areas affected	Greece Yugoslavia Bulgaria
Total damage	$250 million – $1 billion [2]
Max. intensity	VIII (Severe) [3]
Casualties	45–50 killed [2] 100–220 injured [2]

It was the first earthquake that hit a big city in Greece in modern times. It is estimated that 49 people died, 37 of which were living in the same block of flats in the city center that collapsed. More than 220 people were injured and many thousands were left homeless. 3170 buildings (4.5%) were found to have severe damage (red label), 13918 buildings (21.0%) had moderate damage (yellow label), and 49071 buildings (74.5%) were found to have no damage (green label), as per the assessment of the Greek authorities.

There have also been some recorded damage to various local archaeological monuments, such as the Arch of Galerius and Rotunda and the Church of the Acheiropoietos.