Qualla: 1956 Amorgos Earthquake

1956 Amorgos Earthquake: Introduction

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Public domain. It was eleven minutes past three in the morning, local time still dark, when the floor of the Aegean lurched. The date was July 9, 1956, and most of Amorgos was asleep. There was no warning. By the time the shaking stopped, stone houses that had stood for generations had crumbled in the southern Cyclades, and the sea itself was about to do something far stranger than the ground. Off the south coast of the island, the water drew back, then returned as a wave that in places reached heights no one living had ever seen.

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Image: Public domain

1956 Amorgos Earthquake: The Largest in a Century

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Fbarbe, CC BY-SA 4.0. The 1956 Amorgos earthquake registered a magnitude of roughly 7.7 to 7.8, the most powerful to hit Greece in the entire 20th century. Its epicenter lay in the sea just south of Amorgos, the easternmost island of the Cyclades. Thirteen minutes later a second major quake, around ma...

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Image: Fbarbe | CC BY-SA 4.0

1956 Amorgos Earthquake: When the Sea Pulled Back

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The earthquake triggered one of the largest tsunamis the Mediterranean has known in modern times. Along the southern coast of Amorgos, the run-up, the height the water climbed above sea level, reached an astonishing 30 meters. On nearby Astypalaia the waves rose to around 20 mete...

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Image: Mikenorton | CC BY-SA 3.0

1956 Amorgos Earthquake: The Human Toll

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Greece_location_map.svg: Lencer / derivative work: Uwe Dedering (talk), CC BY-SA 3.0. Fifty-three people lost their lives that morning, and about a hundred more were injured. These were not abstractions. They were islanders in their homes before sunrise, families in villages where everyone knew everyone, in a corner of Greece still recovering from war and occupati...

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Image: Greece_location_map.svg: Lencer / derivative work: Uwe Dedering (talk) | CC BY-SA 3.0

1956 Amorgos Earthquake: Why the Aegean Trembles

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The Cyclades sit inside one of the most geologically restless zones in Europe. The African plate grinds northward beneath the Aegean, and the crust here is being stretched and thinned, riddled with faults that slip without much warning. The 1956 rupture was a normal fault, the ki...

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Image: Mikenorton | CC BY-SA 3.0