Iberian Peninsula's Clockwise Spin Mapped by Groundbreaking Geological Study

A slow-motion shift: Spain and Portugal sit on a tectonic turntable, as new analyses reveal the entire Iberian Peninsula is rotating.

December 15, 2025

Tectonic Forces Drive a Gradual Clockwise Rotation

The Iberian Peninsula is rotating, according to new research. The landmass is slowly turning clockwise—a movement driven by Africa's northward drift combined with the unique tectonics along southern Spain. While the western edge of the peninsula is directly pushed by North Africa's movement, the southeastern region acts as a tectonic buffer, absorbing some of the stress, geoscientists report.

The Mediterranean is a complex geological puzzle—and a highly active tectonic zone. This is where the African and Eurasian plates collide, leaving behind a fragmented landscape of plate remnants, submerged microcontinents, and fault lines.

The tectonics of the western Mediterranean—particularly around Gibraltar and the Iberian Peninsula—remain only partially understood. There, Africa and Spain collide head-on, forming a curved subduction zone known as the Gibraltar Arc. Meanwhile, the gradual expansion of the Atlantic also shapes the region's underground. Together, these forces once caused the Mediterranean to nearly dry up around six million years ago.

What's Happening on Europe's Southern Shore?

"Until now, we didn't fully understand the structure of the plate boundaries in this area or the geodynamic processes at play," explains Asier Madarieta of the University of the Basque Country. Precise data has been scarce: "Most high-quality earthquake records only go back to 1980, and accurate satellite data has only been available since 1999. But geodynamic changes unfold over millions of years," the researcher notes.

For their study, Madarieta and his team compiled and standardized GPS data, seismic catalogs, and regional records. Using this information, they developed high-resolution models of underground deformation, tectonic stress, and crustal morphology.

Direct Collision in the West, Buffer in the East

The findings provide the clearest picture yet of the tectonic activity along southwestern Europe. "We can now better identify which sectors are dominated by the collision between Eurasia and Africa and which are still influenced by the westward movement of the Gibraltar Arc," Madarieta says.

The mapping reveals that west of the Strait of Gibraltar, the African and Eurasian plates collide directly. "This transfers stress to the southwestern Iberian Peninsula," Madarieta explains. East of the strait, however, a thinned section of the crust acts as a buffer, deforming and absorbing some of the pressure caused by Africa's northward drift.

The Entire Peninsula Is Rotating

Together, these forces create an uneven distribution of pressure. As a result, the southwestern edge of the peninsula shifts northwestward, while the northeastern edge moves slightly southward. The outcome? The entire landmass is slowly pivoting around its axis. "Our data confirms that the Iberian Peninsula is rotating clockwise," Madarieta reports.

The analysis also supports earlier studies suggesting that the Gibraltar Arc is shifting westward toward the Atlantic. In the distant future, this could form an Atlantic "Ring of Fire"—a new plate boundary along the eastern edge of the ocean.