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Venus Might Still Be 'Volcanically Active' With Erupting Volcano, Lava Flow

A new study is suggesting that one of Venus' volcanoes recently erupted making the planet 'volcanically active' as of today. This was after the researchers conducted a thorough study of the images taken of the surface of Venus where supposed signs of lava flow were seen. Researchers from the German Aerospace Center located in Cologne are studying Idunn Mons, one of the biggest Venus volcanoes believed to be around 120 miles in diameter and 2.5 kilometers in height. This volcano is almost twice the size of the Earth's biggest active volcano called the Mauna Lao.
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'Tantalising' glimpse of volcanic eruptions on Venus

Scientists say they have the best evidence yet that there is hot lava spewing from the surface of Venus.
The planet was known to have an active volcanic history but this is the best evidence yet for ongoing eruptions.

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Hot lava flows discovered on Venus

ESA's Venus Express has found the best evidence yet for active volcanism on Earth's neighbour planet.
Seeing the planet's surface is extremely difficult due to its thick atmosphere, but radar observations by previous missions to Venus have revealed it as a world covered in volcanoes and ancient lava flows.

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A new episode of active volcanism on Venus?

For decades, planetary scientists have debated whether Venus possesses active volcanoes. The latest twist to the tale is provided by data sent back from ESA's Venus Express orbiter, revealing unexplained major changes in the amount of sulphur dioxide gas above the planet's dense cloud layer.
The latest contribution to the investigation into active Venusian volcanism comes from the SPICAV-UV spectrometer on board Venus Express, which has been in orbit around the planet since 2006. By studying the SPICAV data, a team of scientists from France and Russia has discovered an unusual change in the amount of sulphur dioxide (SO2) gas in the upper atmosphere.
The SPICAV data show that the concentration of SO2 above the main cloud deck increased slightly to about 1000 parts per billion by volume (ppbv) between 2006 and 2007, but then steadily decreased over the next five years, reaching only 100 ppbv by 2012. This is very reminiscent of a pattern observed by Pioneer Venus during the 1980s, the only other multi-year dataset of SO2 measurements.

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Have Venusian volcanoes been caught in the act?

Six years of observations by ESA's Venus Express have shown large changes in the sulphur dioxide content of the planet's atmosphere, and one intriguing possible explanation is volcanic eruptions.
The thick atmosphere of Venus contains over a million times as much sulphur dioxide as Earth's, where almost all of the pungent, toxic gas is generated by volcanic activity. Most of the sulphur dioxide on Venus is hidden below the planet's dense upper cloud deck, because the gas is readily destroyed by sunlight.
That means any sulphur dioxide detected in Venus' upper atmosphere above the cloud deck must have been recently supplied from below.

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