Transient foreshock phenomena at Mars and Venus and their effects on the induced magnetosphere and ionosphere

Earth's foreshock is a dynamic environment, home to a cornucopia of energetic and sometimes explosive plasma and fields phenomena which can have global-scale repercussions on our magnetosphere. At Mars and Venus with no intrinsic dynamo field to act as a mediator, foreshock phenomena have the potential to directly impact the ionospheres. Although the foreshock boundaries have been mapped at Venus and Mars, very little is known about the dynamic processes that occur within. Combining the results from three investigations, we jointly present a comparative planetology study, using new results from the NASA MAVEN and ESA Venus Express spacecraft that suggest the presence of a type of explosive foreshock transient not previously identified at an unmagnetized planet, a foreshock bubble, together with new hybrid modelling that demonstrates the global coupling between processes in the foreshock and their impacts on the ionosphere.