BY:SpaceEyeNews.

Venus may not be the geologically quiet world scientists once imagined. New three-dimensional computer models suggest that enormous rifts across its surface could be young, recently active, or even widening today. The finding strengthens the case for ongoing Venus tectonic activity and adds to growing evidence that the planet still changes beneath its dense atmosphere.

Researchers reached this conclusion by studying the raised terrain along the edges of Venusian rifts. These broad, elevated margins may act like geological clocks. Their shape can reveal whether crustal movement stopped long ago or continued into the planet’s recent past.

Giant Venus Rifts May Not Be Ancient Scars

Venus contains vast fracture systems that stretch across thousands of kilometres. Some extend for up to 10,000 kilometres, making them comparable in scale to major continental rifts on Earth.

Scientists have long debated when these structures formed. Earlier estimates often placed their creation more than 100 million years ago. Under that interpretation, the rifts represented traces of a distant and inactive geological period.

However, determining their age from orbit has always been difficult. Venus lacks the same erosion patterns and easily accessible rock record that geologists use on Earth. Its thick clouds also block ordinary optical views of the surface.

NASA’s Magellan spacecraft mapped the planet with radar during the early 1990s. Those observations revealed rifts, volcanoes, plains and unusual circular structures known as coronae. Yet the radar maps alone could not show whether the giant fractures remained active.

A new study published in Nature Geoscience offers another way to estimate their age. Instead of searching for fresh rock samples, researchers examined how rift topography changes over time.

New 3D Models Recreate Venus Tectonic Activity

A team from ETH Zurich created high-resolution, three-dimensional simulations of rift development under Venus-like conditions. Taras Gerya, a professor of geodynamics, led the research group. Lead author Xi Yang conducted much of the work while completing a master’s degree.

Previous models were often two-dimensional. They also relied on simpler assumptions about the behaviour of hot rock, the crust and the mantle.

The new simulations followed the entire rifting process. They showed how the crust stretches, how the central valley forms and how elevated terrain develops along both sides. Researchers also continued the simulations after extension stopped.

That final stage proved important. It allowed the team to compare active rifts with structures that had remained inactive for millions of years.

The models included the effects of rock strength, temperature, pressure and slow deformation. As a result, they offered a more realistic picture of how rifts may evolve on Venus.

Researchers then compared the simulated topography with Magellan-derived maps. Several real rift systems closely matched the younger stages in the models. This similarity suggests that parts of the planet may have experienced recent geological movement.

Raised Rift Flanks Reveal a Geological Timeline

The main clue came from the elevated areas beside each rift. The study describes them as rift-flank uplifts. They may also be called shoulders or raised margins.

When a rift begins to form, the crust stretches and changes shape. This process creates a lower central valley surrounded by broad, high flanks.

According to the simulations, active or young rifts preserve these wide and elevated margins. Once extension ends, the flanks gradually sink and become narrower. Older rifts therefore appear flatter and less pronounced.

Why the Flanks Remain Important

Venus does not experience Earth-like rainfall, rivers or widespread surface erosion. Therefore, scientists cannot explain the changing rift profiles through ordinary weathering alone.

Instead, the raised terrain slowly relaxes under its own weight. Hot rock beneath the surface also moves over long periods. Together, these processes reduce the height and width of the flanks.

The broad uplifts visible beside several Venusian rifts closely resemble the young structures produced in the computer models. That match forms the central evidence for recent Venus tectonic activity.

Still, the study does not prove that every large fracture remains active. Some systems may have stopped spreading recently in geological terms. Others could continue changing today.

Are Venusian Rifts Still Widening?

The models indicate that some fractures may spread at rates between 3 and 10 centimetres per year. That range is faster than many earlier estimates.

However, scientists have not directly measured that movement from the surface. The figures come from simulation scenarios that best reproduce the shapes observed in Magellan data.

This distinction matters. The study presents strong modelling evidence, but it does not show two radar images with a clearly measured change in rift width.

Even so, several centimetres per year would represent meaningful geological motion. Over one million years, that rate could separate parts of the crust by tens of kilometres.

The results also suggest that Venus may release internal heat through regional deformation. The planet does not have a confirmed global system of moving plates like Earth. Instead, hot material may rise from the mantle, weaken the crust and pull specific regions apart.

Tectonic Evidence Joins Active Volcanism

The new findings follow several discoveries that changed how scientists view modern Venus.

In 2023, researchers reanalysed Magellan radar images of Maat Mons. They found that a volcanic vent changed shape and expanded between two observations made eight months apart in 1991. NASA described the discovery as the first direct evidence of an eruption on Venus.

A second analysis, announced in 2024, found changes linked to lava flows at two additional locations. Those results suggested that volcanic activity may occur more often than scientists once believed.

NASA researchers also reported evidence in 2025 that large coronae may still experience tectonic deformation. These findings do not prove Earth-like plate tectonics. However, they support a planet with an active interior and a surface that continues to respond.

Together, volcanism, corona deformation and young rifts present a consistent picture. Venus may remain geologically dynamic, even though its activity works differently from Earth’s.

Future Missions Will Test Venus Tectonic Activity

Upcoming missions could determine whether the rifts are moving now.

ESA’s Envision mission currently targets a November 2031 launch. The spacecraft will use radar, spectrometers and radio-science instruments to study Venus from its interior to its upper atmosphere. Its radar system should map selected areas at far higher resolution than Magellan achieved.

Repeated radar observations will be especially valuable. Scientists could compare images taken months or years apart and search for displaced terrain, altered vents or new lava deposits.

The new models can also guide mission planners toward the most promising targets. Regions with broad and elevated rift flanks may deserve priority because they could preserve the clearest signs of recent activity.

Venus Is Emerging as a Dynamic World

The raised margins of Venus’s giant fractures may record a far more active history than scientists once assumed. Their shapes suggest that some rifts formed recently, stopped moving only a short geological time ago, or continue widening today.

Future radar missions must confirm direct movement. Yet the evidence already challenges the idea of a frozen planet.

Combined with signs of recent eruptions, the new study shows that Venus tectonic activity may still reshape the surface. Understanding that process could reveal how rocky planets release internal heat without Earth-style plate tectonics. It may also help astronomers interpret distant rocky worlds beyond our Solar System.