Sun's 94-Day 'Monster' Active Region Unleashed Earth-Impacting Space Weather

A 94-day observation of solar active region NOAA 13664 by Solar Orbiter and SDO captured its evolving magnetic field, revealing the Sun's strongest geomagnetic storms in over two decades and causing auroras visible as far south as Switzerland along with disruptions to satellites and railway signaling; the study, published in Astronomy & Astrophysics, marks a major advance in understanding space weather.