Crete Earthquake Swarm
Magnitude 5.8 Earthquake Strikes Off Crete, Greece; Two Moderate Tremors Follow with No Damage
Key Points
The European-Mediterranean Seismological Centre said the quake was located about 69 km south-southwest of the city of Rethymno on Crete.
Details on the doublet: the first 4.6-magnitude tremor was recorded at 12:31 p.m., with its epicenter about 5 km northeast of the islet of Gavdos and a focal depth estimated at 13.4 km.
Six minutes later, a 5.3-magnitude earthquake followed, with an epicenter about 6 km east of Gavdos and a focal depth estimated at 10 km.
The tremors were felt across multiple parts of Crete, according to local reporting.
A magnitude 5.8 earthquake struck off the coast of Greece on Saturday, centered about 69 km south-southwest of Rethymno on the island of Crete, according to EMSC. The quake hit at a depth of roughly 13 km (8 miles), and there were no immediate reports of damage or injuries.
The 5.8-magnitude tremor was part of a broader seismic sequence that rattled the region. Just minutes before the main quake, two separate earthquakes — a 4.6 and a 5.3 — struck near the tiny islet of Gavdos off southeastern Crete, shaking communities across the island.
Three Quakes Strike Within Minutes of Each Other
The seismic sequence began at 12:31 p.m. local time with a 4.6-magnitude tremor, according to Greek City Times. Its epicenter was about 5 km northeast of Gavdos, at a depth of 13.4 km. Six minutes later, at 12:37 p.m., a stronger 5.3-magnitude quake hit 6 km east of Gavdos at a depth of 10 km.
Then came the largest jolt — the 5.8-magnitude earthquake centered 69 km from Rethymno. Times of Israel reported no damage from any of the three tremors. ANA-MPA noted that roughly 20 aftershocks followed within an hour of the main quake.
Experts Call It a Swarm, Urge Calm
Efthymios Lekkas, head of Greece's Earthquake Planning and Protection Organization, said this kind of activity is often an "earthquake swarm" — where energy releases through many smaller quakes instead of one big one. He called it "highly unlikely" that a major catastrophic quake would follow, based on current fault data.
Seismology professor Gerasimos Papadopoulos warned that the sequence is "aggressive" but noted the quakes' distance from shore reduces the risk of structural damage. He said "the biggest danger comes from heavy objects inside our homes and from panic," according to News247.
Crete Sits on Europe's Most Active Fault Zone
Crete lies on the boundary where the African and Eurasian tectonic plates collide, making it the most seismically active region in Europe, according to Greek City Times. The "Greek arc" typically sees at least one magnitude 6.0 or larger earthquake every year. Saturday's 5.8-magnitude event came close to that threshold.
The June 20 quakes follow a busy stretch of seismic activity in the area. On April 24, 2026, a magnitude 5.7 earthquake hit southeast of Ierapetra, also without injuries. Professor Papadopoulos said it is "not common" for Greece to see so many earthquakes of this size in such a short window.
Tourism Concerns Rise as Peak Season Begins
The timing raised eyebrows. Crete welcomed more than 6 million tourists in 2025, and Saturday's quakes hit at the start of the peak summer season, according to The Independent. Authorities are monitoring any potential impact on the island's vital hospitality industry.
As a precaution, the Imbros Gorge was temporarily closed, and inspections of the Samaria Gorge were called for due to landslide risks, according to ANA-MPA. Greek police patrolled Rethymno and Chania and officially reported no damage. Civil protection authorities remained on "heightened readiness."
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