Then, in 2010, a ship passing overhead registered a large magnetic disturbance on the sea floor. (newscientist.com)
Team member Robert Erdélyi at the University of Sheffield, UK, says that energy is probably channelled in the form of magnetic disturbances called torsional Alfvén waves, which race up the twisted field lines of the tornado to be dissipated as heat in the corona. (newscientist.com)
Sunspots are huge magnetic disturbances on the surface of the sun, and their presence indicates increased overall activity. (gergs.net)