The aurora is the most visible manifestation of the connection of the Earth to the space environment and has inspired awe, curiosity, and scientific inquiry for centuries. Recent advances in observing techniques and modeling and theoretical work have revealed new auroral phenomena, provided a better understanding of auroral dynamics, and have led to an enhanced capability for auroral forecasts.

This monograph features discussions of:

• New auroral phenomena due to the ring current ion and polar rain electron precipitation
• Various auroral forms and hemispheric...