Induced Magnetosphere

28 May 2020

At ... the induced magnetosphere of Mars. Five years after NASAs MAVEN spacecraft entered into orbit around Mars data from the  mission has led to the creation of a map of electric current systems in the Martian atmosphere. Scientists are looking at using the currents to determine the precise amount of energy that is derived from the solar wind in order to power atmospheric escape. The link comes with an interesting video by the scientists. One to watch.

Earth's aurorae are strongly linked to electic currents generated by the interaction of the magnetosphere with the solar wind - that flow along vertical magnetic field lines into the atmosphere. The difference between Earth and Mars, we are told, is that our magnetism comes from earth's core. That of Mars does not. Something different is operating on Mars we are then told. The solar wind generates magnetism that builds up on Mars. An induced magnetosphere.

One commenter adds - vertical magnetic lines = Peratt's gradients (or layers of ionised plasma). Another one asks, does this mean the Wiki needs revising.