image: Researchers have obtained the first thorough data on how a superstorm compresses Earth's plasmasphere, shedding light on why it took more than four days to recover—an event that led to disruptions in GPS and communication networks. Credit: Institute for Space-Earth Environmental Research (ISEE), Nagoya University A geomagnetic superstorm is a powerful space weather phenomenon initiated when the Sun shoots vast bursts of charged particles and energy at Earth. These rare events happen