A major tectonic segment in central Ethiopia has entered a highly aggressive active phase, with scientists tracing an unprecedented underground magma intrusion that has triggered hundreds of strong earthquakes, ruptured the landscape, and forced thousands of local families to abandon their homes.

Axar.az reports, citing a comprehensive geodynamical investigation published in the international scientific journal Geophysical Journal International, the volatile Fentale-Dofen magmatic segment within the Northern Main Ethiopian Rift experienced a massive subsurface rifting event that began in late December 2024 and extended into the spring of 2025.

Underground Giant: The 50-Kilometer Magma Dyke

Using advanced satellite radar technology and novel seismic tracking models, researchers from the U.S. Geological Survey (USGS) and international monitoring teams successfully mapped the massive underground culprit. The ground deformation was driven by a gargantuan magmatic dyke—a continuous, 50-kilometer-long vertical fracture tearing through the Earth's crust, filled with high-pressure, molten basaltic rock.

This massive volume of moving magma aggressively pushed the earth aside, generating intense physical stress that fractured upper crustal faults and caused sections of the surface landscape to displace horizontally by up to a meter, while leaving adjacent zones heavily fractured and destabilized.

Hundreds of Tremors and Growing Surface Destruction

The intense underground pressure triggered a relentless swarm of more than 300 earthquakes concentrated between the Fentale and Dofen volcanoes. The seismic crisis peaked violently on February 14, 2025, when a powerful magnitude 5.9 earthquake shook the southeastern flank of Fentale volcano, terrifying residents across the region.

The massive underground structural cracking caused severe ground shaking and led to the violent eruption of boiling water, heavy sediment, and rocks shooting out directly from deep ground fissures. This extreme physical destruction damaged civil infrastructure, severely compromised buildings, split local roads, and forced the emergency evacuation of thousands of displaced residents seeking safety from the unstable terrain.

Phreatic Eruptions on the Flanks of Dofen Volcano

As the high-pressure magmatic dyke migrated rapidly northeastward toward Dofen volcano at an estimated speed of 0.06 meters per second , it violently disrupted the region's shallow hydrothermal networks. The searing thermal energy of the climbing basaltic magma instantly vaporized subterranean water reservoirs, triggering two distinct phreatic (steam-driven) explosions on the flanks of Dofen volcano.

These hydrothermal blasts sent plumes of steam and fragmented debris into the air, signaling to volcanologists that the vast magma intrusion was actively altering and destabilizing the delicate geothermal systems connecting the two prominent volcanic centers.

The Birthplace of a New Ocean Basin

The Fentale-Dofen segment sits in a critical position where the Arabian, Nubian, and Somalian tectonic plates are actively tearing away from each other. This latest magmatic surge marks a powerful, localized acceleration of ongoing continental rifting.

Geologists emphasize that while these episodes cause acute hazards for local populations today, they represent the literal mechanics of continental breakup. Over the long term, as the African continent continues to rip apart along this line, the expanding rift basin will eventually sink low enough to allow the waters of the Red Sea and the Gulf of Aden to flood the depression, permanently dividing the landmass and forming a brand-new ocean basin on Earth.