A geomagnetic superstorm is an extreme space weather event that occurs when the Sun releases massive amounts of energy and charged particles toward Earth. These storms are rare, occurring about once every 20-25 years. On May 10-11, 2024, the strongest superstorm in over 20 years, known as the Gannon storm or Mother’s Day storm, struck Earth.  

A study led by Dr. Atsuki Shinbori from Nagoya University's Institute for Space-Earth Environmental Research has captured direct measurements of this extreme event and provided the first detailed observations of how a superstorm compresses Earth's plasmasphere—a protective layer of charged particles that encircles our planet. Published in Earth, Planets and Space, the findings show how the plasmasphere and ionosphere react during the most violent solar storms and help forecast disruptions to satellites, GPS systems, and communication networks during extreme space weather events. 

A Japanese research team has studied the variations in beryllium-7 concentrations in the surface air over the Antarctic regions of Southern Ocean. Beryllium-7 is a radioactive isotope of beryllium produced by cosmic rays in the atmosphere. The team explored, over space and time, how the beryllium-7 is transported from the atmosphere to the Earth’s surface. Their goal was to better understand the mechanisms of atmospheric mixing on Earth.