It seems that there are two coronae that can be observed on the surface of Venus. The structures have the form of rings, and they are formed when hot material coming from the deep inside the planet rises and erupts through the crust.
Research led by UMD’s Laurent Montesi has shown that at least 37 coronae on Venus prove there’s geologic activity – especially one that’s called Aramaiti.
There’s also a new study that shows 37 recently active volcanic structures on Venus. This study comes with the best evidence that Venus is still a dynamic planet.
Laurent Montési stated: “This is the first time we are able to point to specific structures and say ‘Look, this is not an ancient volcano but one that is active today, dormant perhaps, but not dead.’ This study significantly changes the view of Venus from a mostly inactive planet to one whose interior is still churning and can feed many active volcanoes.”
Astronomers have known for quite a while that Venus has a much younger surface than other planets, such as Mercury and Mars – these have cold interiors. There are pieces of evidence of a warm interior and geologic activity on the surface of the planet, in these structures, which are known as coronae. They form when plumes of hot material from inside the planet rise through the mantle and the crust.
However, scientists thought that the coronae on Venus were simply signs of the ancient activity and that Venus has cooled enough for the geological activity from the interior of the planet to stop. They also thought it would harden the crust that any warm material from deep inside won’t be able to go through it.