Active Faulting and Seismic Hazard in the Aegean Region

The Aegean region sits at the junction of the Anatolian and African plates, where complex interactions drive intense crustal deformation and frequent earthquakes. Southward subduction of the African plate beneath the Hellenic arc produces overriding extensional stresses, while westward escape of the Anatolian block along major strike-slip faults adds a component of lateral motion. Superimposed on these large-scale motions, a network of normal, oblique and strike-slip faults accommodates distributed strain across the Aegean microplate. GPS measurements and geological studies reveal rapid slip rates on border faults of active rifts, high strain accumulation in inter-island corridors and evidence for segmented ruptures capable of generating moderate to large earthquakes. Historical records and palaeoseismic investigations highlight hazardous fault zones beneath the Gulf of Corinth, the North Aegean Sea and within the Cyclades. Improved understanding of fault geometry, slip history and strain partitioning is critical for refining probabilistic seismic hazard models, guiding building standards and informing coastal resilience strategies across this densely inhabited and infrastructure-rich region.

Research from Nature Portfolio

High-resolution sedimentary records from the offshore Corinth Rift provide a long-term perspective on the interplay between fault growth and environmental change. Drill cores spanning hundreds of thousands of years demonstrate how glacial–interglacial sea-level cycles modulate sediment delivery and influence fault loading at orbital timescales. During lowstand intervals, enhanced sediment flux leads to increased fault burial and potential overpressure, whereas highstand phases favour more stable deposition and reduced fault activity. This work establishes a link between climate-driven sedimentation patterns and syn-rift deformation processes, offering a model for how early rift basins evolve under coupled tectonic and surface-process controls.

Active Faulting and Seismic Hazard in the Aegean Region publication trend

The graph below shows the total number of articles in active faulting and seismic hazard in the aegean region across all publications each year (not limited to Nature Index journals).

Technical terms

Normal fault: A fracture where the hanging wall moves downward relative to the footwall, typically under extensional stress.

Slip rate: The average pace of displacement across a fault, usually expressed in millimetres per year.

Strain rate: A measure of deformation per unit time in the crust, derived from geodetic or geological data.

b-value: A parameter in the Gutenberg–Richter relation indicating the relative proportion of small to large earthquakes.

Template matching: A seismic analysis technique that uses known waveforms to detect and precisely locate smaller or overlapping events.

References

1. High-resolution record reveals climate-driven environmental and sedimentary changes in an active rift. Scientific Reports (2019).
2. The Upper Crustal Deformation Field of Greece Inferred From GPS Data and Its Correlation With Earthquake Occurrence. Journal of Geophysical Research: Solid Earth (2024).
3. Increasing fault slip rates within the Corinth Rift, Greece: A rapidly localising active rift fault network. Earth and Planetary Science Letters (2024).
4. Cluster Analysis of Seismicity in the Eastern Gulf of Corinth Based on a Waveform Template Matching Catalog. Sensors (2023).