Venus May Harbor Massive Lava Tubes Beneath Its Surface

Recent research indicates that Venus may harbor extensive subsurface lava tubes, potentially up to 1 kilometer wide. These structures, formed by volcanic activity, are similar to those found on Earth, the Moon, and Mars. The study, accepted for publication in the journal Icarus, utilized Finite Element Limit Analysis (FELA) to estimate the structural stability of such tubes under Venusian conditions. The researchers found that the planet's surface gravity, approximately 91% that of Earth's, allows for the stability of lava tubes with widths of several hundred meters, aligning with observed Venusian channel sizes. The study suggests that future missions equipped with high-resolution imaging and geophysical instruments could detect surface features indicative of these subsurface structures, such as pit chains, skylights, and gravity anomalies. However, confirming their existence poses significant challenges due to Venus's extreme surface conditions and dense cloud cover. Upcoming missions like NASA's Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging (DAVINCI) and Venus Emissivity, Radio Science, InSAR, Topography, and Spectroscopy (VERITAS) aim to explore the planet's surface and atmosphere, potentially providing further insights into these geological formations.