Japanese Researchers Discover Unusually High Red Auroras
Researchers from Hokkaido University and the Okinawa Institute of Science and Technology have observed rare red auroras above Japan, extending 500 to 800 kilometers above Earth's surface. These auroras, typically seen near polar regions, were recorded during moderate geomagnetic storms, challenging previous understandings of auroral altitudes. The study suggests that these storms may be stronger than conventional indices indicate, as dense solar wind streams compress Earth's magnetosphere, causing the upper atmosphere to expand and push auroras to higher altitudes. 
