Giant Lava Tube Discovered Beneath Venus’ Surface

Scientists have uncovered the first evidence of a massive underground lava tube on Venus, a discovery that could reshape our understanding of the planet’s volcanic history and internal structure. The finding, detailed in a study published in Nature Communications, confirms long-held theories about Venus’ volcanism and the potential for subsurface cavities.

Unveiling Venus’ Hidden Depths

Researchers from the University of Trento re-examined radar data collected by NASA’s Magellan spacecraft, which mapped almost the entire surface of Venus between 1990 and 1994 ¹. By analyzing these images, they identified a distinct feature near Nyx Mons, a large shield volcano, suggesting the presence of an empty lava tube.

“Our knowledge of Venus is still limited, and until now we have never had the opportunity to directly observe processes occurring beneath the surface of Earth’s twin planet,” explained Lorenzo Bruzzone, a professor at the University of Trento and co-author of the study ². “The identification of a volcanic cavity is therefore of particular importance, as it allows us to validate theories that for many years have only hypothesized their existence.”

How Lava Tubes Form

Lava tubes are created by volcanic activity, typically forming as a byproduct of basaltic lava flows. As lava flows, its surface can cool and solidify, while the molten lava continues to travel beneath, creating an underground tunnel ³. These tubes can be significantly larger than those found on Earth or Mars.

The Venusian Lava Tube: A Detailed Seem

The detected lava tube is approximately 0.6 miles (1 kilometer) wide and boasts a roof thickness of around 490 feet (150 meters). The empty cavity within the tube is at least a quarter of a mile (375 meters) high ⁴. This discovery suggests that Venus may harbor a network of such underground structures, shaped by the planet’s intense volcanic activity.

Implications for Future Exploration

The detection of this first lava tube on Venus opens new avenues for planetary exploration. Future missions, such as NASA’s VERITAS and the European Space Agency’s EnVision, both slated to launch in 2031, will be equipped with advanced radar systems capable of penetrating the planet’s dense atmosphere and detecting additional subsurface cavities ². These missions will provide a more comprehensive understanding of Venus’ geological evolution.

“This discovery contributes to a deeper understanding of the processes that have shaped Venus’s evolution and opens new perspectives for the study of the planet,” Bruzzone added ².