Surface changes observed on a Venusian volcano during the Magellan mission

• 成果类型: Article
• 署名作者: Herrick, Robert R.; Hensley, Scott
• 署名单位: University of Alaska System; University of Alaska Fairbanks; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); California Institute of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12333
• DOI: 10.1126/science.abm7735
• 发表日期: 2023-03-24
• 页码: 1205-1208
• 关键词: regio

摘要

Venus has a geologically young surface, but it is unknown whether it has ongoing active volcanism. From 1990 to 1992, the Magellan spacecraft imaged the planet's surface, using synthetic aperture radar. We examined volcanic areas on Venus that were imaged two or three times by Magellan and identified an similar to 2.2-square-kilometer volcanic vent that changed shape in the 8-month interval between two radar images. Additional volcanic flows downhill from the vent are visible in the second-epoch images, although we cannot rule out that they were present but invisible in the first epoch because of differences in imaging geometry. We interpret these results as evidence of ongoing volcanic activity on Venus.