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Idunn Mons: Evidence for Ongoing Volcano-tectonic Activity and Atmospheric Implications on Venus

D'Incecco, P.; Filiberto, J.; López, I. +2 more

In 2010 the ESA Venus Express Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) instrument first observed 1 µm emissivity anomalies over the top and eastern flank of Idunn Mons (46° S; 146° W), a 200 km wide volcano located in Imdr Regio, a volcano-dominated large volcanic rise of Venus. The anomalies suggest the presence of chemica…

Using VIRTIS on Venus Express to Constrain the Properties of the Giant Dark Cloud Observed in Images of Venus by IR2 on Akatsuki

Tsang, Constantine C. C.; Barstow, Joanna K.; McGouldrick, Kevin +1 more

A cloud opacity contrast feature that has been called a "long-lived sharp disruption" has been seen in the atmosphere of Venus in the near-infrared using Akatsuki's IR2 camera, most clearly at equatorial latitudes. This feature was found to have a consistent planet-circling period of 4.9 days, and subsequent searches of past imagery revealed that …