Imagine a small Italian town, nestled in the shadow of the Alps, suddenly bathed in an eerie red glow—not once, but twice in three years. This isn't a scene from a sci-fi movie; it's real. On November 17, nature photographer Valter Binotto captured a stunning, UFO-like halo stretching 200 kilometers across the sky, hovering at an altitude of 100 kilometers. This wasn't the first time—in March 2023, Binotto spotted an identical phenomenon in the same spot: Possagno, a quaint town of just 2,200 residents in northern Italy. But here's where it gets controversial: despite their otherworldly appearance, these halos aren't signs of alien visitors. Instead, they're a rare atmospheric phenomenon called ELVEs (Emission of Light and Very Low-Frequency Perturbations due to Electromagnetic Pulse Sources).
ELVEs are essentially expanding rings of light that form in the lower ionosphere, triggered by the electromagnetic pulse (EMP) of a lightning strike. They’re incredibly fleeting, lasting just a millisecond, which makes them a challenge to observe and study without advanced technology. As Binotto explained to Spaceweather.com, 'The red ring marks the spot where the EMP hit Earth's ionosphere.' What’s even more fascinating? The lightning bolt responsible for this event carried an electrical current of approximately 303 kilo-amperes—10 to 30 times stronger than your average thunderstorm discharge. And this is the part most people miss: while ELVEs appear reddish on Earth due to nitrogen in our upper atmosphere, they’d look blue or pink on a planet like Jupiter, where hydrogen dominates.
NASA first discovered these glowing rings in the 1990s, classifying them as part of Transient Luminous Events (TLEs)—colorful, lightning-fast flashes generated by thunderstorms above the clouds. TLEs come in various shapes and sizes, each with a whimsical name. In 2019, scientists using data from Juno's ultraviolet spectrograph instrument (UVS) confirmed the presence of TLEs in Jupiter's upper atmosphere for the first time, validating decades of theoretical predictions. But here’s the real question: Why has this tiny Italian town been the stage for such a rare event—twice? Is it mere coincidence, or is there something unique about Possagno’s location? Let us know what you think in the comments—is this a freak of nature, or is there more to the story?
