A major volcanic eruption on Earth is changing how scientists search for active volcanoes on Venus. This new method could help determine if Venus is still geologically active. The findings will be published in the June 2026 issue of the Journal of Volcanology and Geothermal Research.
Venus is known for its many volcanoes—over 85,000 have been found. Most of the planet’s surface seems to have been reshaped by lava in the last 500 million years, hinting at a tumultuous geological past. For a long time, experts thought this volcanic activity happened mainly during one massive event, after which the planet fell silent.
However, recent analysis of data from NASA’s Magellan mission is challenging this belief. Evidence like subtle surface changes and high levels of sulfur dioxide and carbon dioxide in the atmosphere suggests that volcanic processes might still be occurring. But without direct observations of eruptions, this theory remained uncertain.
Research on Earth plays a crucial role in this investigation. By studying how lava acts and cools here, scientists can model what they might observe on Venus. This study marks a significant step in connecting Earth-based research with outer space exploration, paving the way for deeper understandings.
The eruption of Mauna Loa in late 2022 was particularly helpful. As the largest active volcano on Earth, it erupted multiple times. This recent event stood out because researchers could access both public and private satellite data, enabling near real-time tracking of lava movement. Combining these datasets provided new insights into how lava spreads and cools.
Ian Flynn, a geologist from the University of Pittsburgh, noted the importance of these insights. He stated, “When we search for active lava flows on other planets, knowing how long it takes for lava to cool on Earth will help us better understand what’s happening if we see a hot flow on Venus.” The team also used machine learning to identify patterns leading up to the eruption, such as underground heat buildup observed a month before lava reached the surface. This approach could help predict eruptions on Earth and beyond.
In a groundbreaking shift, researchers transitioned from 2D satellite images to 3D lava flow models. Understanding lava thickness is vital to knowing how long it stays hot and how far it moves. Collaborating with NASA’s Goddard Space Flight Center, researchers adapted techniques used for measuring glaciers, allowing them to accurately assess the depth of Mauna Loa’s lava flows.
The results were telling: flows thicker than 20 meters took around 21 months to cool completely. This data is crucial for interpreting thermal signals from Venus, helping scientists determine if a flow is recent or ancient.
The implications for future Venus exploration are exciting. Missions like NASA’s VERITAS, scheduled for the early 2030s, aim to map the planet’s surface with high precision. The accuracy of these interpretations will rely heavily on models derived from Earth. Flynn remarked, “Knowing how lava cools enables scientists to better constrain our models when we find active volcanoes on other planets.”
By understanding cooling rates, flow thickness, and thermal signatures, scientists can pinpoint regions on Venus that may still be volcanically active. This method turns raw satellite data into a timeline of geological activity, providing a clearer way to confirm ongoing eruptions.
Recent statistics show that NASA’s interest in Venus is at an all-time high, with over 30 active missions targeting the planet within the next decade. This represents a shift in planetary research focus, aiming to uncover the mysteries of our neighboring world.
As technology advances and more data becomes available, our understanding of Venus could reveal that its volcanic activity is not just a thing of the past, but a present reality.
