9. The Blue Lightning Storm of the Eyjafjallajökull Eruption (2010)
Along with upsetting European air travel when Iceland’s Eyjafjallajökull volcano erupted in 2010, its ash plume created an amazing display of blue lightning. Observers saw an almost constant blue-tinged lightning bolt appear across the dark volcanic clouds for several weeks. This extended occurrence gave researchers an unheard-of chance to closely examine volcanic lightning. Researchers found that the interaction of electrical discharges with sulphur compounds and other gases expelled by the volcano most likely produced the blue colour. It was discovered that the frequency and intensity of the lightning matched the eruptive activity of the volcano, implying that one might monitor volcanic eruptions using lightning detection. Apart from inspiring public imagination, the Blue Lightning Storm of Eyjafjallajökull greatly advanced our knowledge of the intricate interaction between volcanic activity and atmospheric electricity, so enabling enhanced volcanic hazard assessment and early warning systems.
10. The Gigantic Jet of 2017
Researchers in Oklahoma obtained thorough pictures and video of a large blue lightning discharge sometimes referred to as a “gigantic jet” in August 2017. Reaching an altitude of almost 80 kilometres, this uncommon event—which stretched from the top of a thundercloud to the lower border of space—was among the greatest electrical discharges ever recorded in Earth’s atmosphere. Rising at its highest points like an inverted tree, the enormous jet seemed as a magnificent blue streak of light. The thorough data gathered—including high-speed video, spectral measurements, and radar information—made this observation especially useful. Examining the incident found that the enormous jet moved an unheard-of quantity of charge from the surface of Earth to the ionosphere, equal to the energy of around one hundred ordinary lightning bolts. This discovery questioned accepted theories of atmospheric electricity and proposed that such events might be very important in the global electrical circuit. Since then, the 2017 Gigantic Jet observation has become pillar of knowledge on upper-atmospheric electrical events, driving fresh investigation on their genesis, frequency, and possible effects on terrestrial climate systems and space weather.