Qualla: 2018 Ionian Sea Earthquake

2018 Ionian Sea Earthquake: Introduction

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. The clocks in Zakynthos read 01:54 when it happened. In the Ionian Sea southwest of the island, 14 kilometers below the seafloor, the African and Eurasian plates lurched against each other on the night of October 25–26, 2018. The magnitude 6.8 earthquake that followed was felt across nine countries — Malta, Libya, Italy, Greece, North Macedonia, Albania, Bosnia, Bulgaria, and Turkey all registered the shaking, some of them 800 kilometers from the epicenter. A tsunami advisory was issued. Sea levels changed by up to 20 centimeters along Greek and Italian coastlines. And yet, on Zakynthos itself, where the shaking was strongest, no one died. Three people were injured. About 120 homes were left uninhabitable. The town laterally shifted 5 centimeters. The port took major damage. Schools closed the next morning. But the island stood — because it had built to survive exactly this.

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

2018 Ionian Sea Earthquake: A Fault Zone With a Long Memory

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. Zakynthos sits at one of the most seismically active intersections in Europe. The island lies close to the convergent boundary where the African plate pushes under the Eurasian plate, and it is also near the Cephalonia-Lefkada Transform Fault, a strike-slip fault zone that has ge...

Image: Mikenorton | CC BY-SA 3.0

2018 Ionian Sea Earthquake: Why the Buildings Held

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. The reason Zakynthos survived 2018 so well comes down to 1953. On August 12 of that year, a magnitude 7.2 earthquake levelled the southern Ionian Islands. Zakynthos and Kefalonia were, as the historical record puts it, 'practically levelled.' The human toll was severe. When the i...

Image: Mikenorton | CC BY-SA 3.0

2018 Ionian Sea Earthquake: The Tsunami Advisory

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. Any earthquake of this magnitude in the Ionian Sea triggers immediate concern about tsunamis. The same geological zone produced the 365 CE Crete earthquake, which generated a tsunami that devastated coastlines across the Eastern Mediterranean. Authorities issued an advisory after...

Image: Mikenorton | CC BY-SA 3.0

2018 Ionian Sea Earthquake: Aftermath and Memory

Sun, 14 Jun 2026 00:00:00 GMT

Photo credit Mikenorton, CC BY-SA 3.0. On Zakynthos, the 2018 earthquake became another chapter in a long record of seismic events that the island has learned, over centuries, to absorb. The 1997 magnitude 6.6 quake had severely damaged the historic fortress-monastery on the Strofades, 44 kilometers to the south. The ...

Image: Mikenorton | CC BY-SA 3.0