Seismic Activity in Greece: M4.6 Earthquake on July 1, 2026

A seismic event measuring magnitude 4.6 has been recorded by global monitoring networks, with the epicentre located 63 km SW of Kýthira, Greece. The earthquake occurred at 12:03 UTC on Wednesday, July 1, 2026 and was detected at a focal depth of 50.0 km.

Seismological Overview

Earthquakes are the result of sudden energy release in Earth's crust, most commonly along fault lines where tectonic plates interact. This energy radiates outward as seismic waves — measured and characterised by networks of seismographs operated by agencies including the USGS, JMA, EMSC, and GFZ.

Greece and the broader Aegean region are among the most seismically active areas in Europe, positioned along the Hellenic Arc where the African Plate subducts beneath the Eurasian Plate.

Event Parameters in Detail

Magnitude: 4.6 (moment magnitude scale, Mw) — a moderate earthquake.
Depth: 50.0 km
Location: 63 km SW of Kýthira, Greece
Time: 12:03 UTC on Wednesday, July 1, 2026

At a focal depth of 50.0 km, this is classified as a shallow earthquake (0–70 km). Shallow events are typically the most damaging: the seismic energy has less distance to travel before reaching the surface, resulting in stronger and more abrupt ground shaking at the epicentre.

Energy and Ground Motion

A magnitude 4.6 earthquake releases approximately roughly 500 tonnes of TNT of energy. For comparison, this exceeds the energy released by most conventional explosive events and is sufficient to shift tectonic stress in measurable ways across a wide region.

Moderate earthquakes are felt by virtually everyone near the epicentre. Strong shaking lasting 10–30 seconds can topple unsecured items, crack plaster, and cause poorly anchored objects to fall. Aftershocks are common following moderate events.

Significant damage can occur to vulnerable structures — particularly unreinforced masonry, old adobe buildings, and poorly maintained older construction. Well-engineered modern buildings are designed to withstand this level of shaking with minimal structural impact, though contents may shift and non-structural elements (ceilings, partitions) can be damaged.

Regional Seismic History

Greece accounts for approximately 50% of all seismic energy released in Europe. The Ionian Islands, Crete, and the North Aegean are historically the most active zones, though significant earthquakes can and do occur across the entire country.

Public Safety Guidance

For residents in the affected area, the immediate priority is assessing personal safety and structural integrity. During and after an earthquake, follow instructions from official civil protection, emergency services, and government authorities. Avoid spreading unverified information on social media. Official channels provide the most reliable information about aftershock risk, evacuation orders, and available assistance.

If you are on or near a coast and experience strong or prolonged earthquake shaking, treat it as a potential tsunami warning and move immediately to high ground. Do not wait for an official alert — natural warning signs (severe shaking, unusual sea withdrawal) are your first alert.

The Greek Earthquake Planning and Protection Organisation (OASP/EPPO) provides guidance and resources for residents. Standard Drop, Cover, Hold On procedures apply, and coastal residents should move inland immediately after strong shaking.

Continued Monitoring

The USGS and regional seismic networks will continue to monitor this event for aftershock activity. QuakeWatch aggregates this global data in real time — you can view all current seismic activity on our live map, or explore our earthquake science guides to learn more about the forces behind events like this one.

Community Felt Reports

If you felt this earthquake, your experience contributes to an important scientific dataset. The USGS "Did You Feel It?" (DYFI) system and QuakeWatch's own community reports platform collect first-hand accounts of shaking intensity from people across the affected region. These reports — describing where people were, what they felt, and what moved or was damaged — help seismologists map shaking intensity across an area much larger than any single seismograph can cover. Visit the earthquake's detail page on our live map to submit your own report.