India’s Aditya-L1 has strengthened the global scientific mission to understand one of the most powerful solar storms recorded in recent history. The Earth was hit by the greatest solar storm in more than twenty years in May 2024, which was later dubbed “Gannon’s storm”. The event was caused by the Sun’s huge coronal mass ejections. These CMEs are massive clouds of hot gas and magnetic energy that travel through space. When they collide with the Earth’s magnetic shield, they can disrupt satellites, weaken communications, distort GPS signals, and even strain power systems.
A team of Indian researchers has now published a big study that explores why this storm acted in such a rare and unexpected manner. Scientists observed that two CMEs collided in space, compressing each other fiercely. This pressure drove the magnetic field lines inside one CME to snap and reattach, a phenomenon known as magnetic reconnection. The sudden reversal of magnetic fields increased the storm’s intensity. Satellites also recorded particles accelerating rapidly, confirming the extraordinary energy increase.
India’s Aditya-L1 mission was helpful in this investigation. Working with six American satellites, it provided numerous viewpoints on the same event. Aditya-L1’s precise magnetic readings helped map a large reconnection zone over 1.3 million km wide.
