Often originating in helmet streamers and sometimes associated with Moreton waves and arcades, they can cause Auroras via magnetic reconnection, and can cause power outages and disrupt transmissions like solar flares.
These events are immediately followed by a suppression of cosmic ray intensity known as the Forbush Decrease, and the SECCHI instrument is designed to study the evolution of these events. Low and Smith used a low-dimensional MHD model to propose that they evolve from a magnetic bubble called a flux rope which then destabilizes when a toroidal current is applied, which was partly confirmed by the LASCO experiment. Typically they contain a dense core called the prominence and a cavity of low electron density. Often originating in helmet streamers and sometimes associated with Moreton waves and arcades, they can cause Auroras via magnetic reconnection, and can cause power outages and disrupt transmissions like solar flares. The cause of an 1859 storm and usually originating from groups of sunspots, this is for 10 points, what events in which the outer layer of the sun spews a bunch of plasma and a trailing magnetic field?
These events are immediately followed by a suppression of cosmic ray intensity known as the Forbush Decrease, and the SECCHI instrument is designed to study the evolution of these events.
{Coronal Mass Ejections} or {CME}