On Friday, Earth was hit by the most potent solar storm in over two decades, unleashing breathtaking auroras from Tasmania to Britain while posing potential risks to satellites and power grids.
The event, spurred by several coronal mass ejections (CMEs) from the Sun, began around 1600 GMT, as reported by the National Oceanic and Atmospheric Administration (NOAA)’s Space Weather Prediction Center.
This solar storm was swiftly upgraded to an “extreme” geomagnetic storm, marking the first such occurrence since the “Halloween Storms” of October 2003, which caused significant disruptions, including blackouts in Sweden and infrastructure damage in South Africa. Forecasters anticipate additional CME impacts over the next few days.
Across social media platforms, individuals shared captivating images of auroras illuminating the skies above northern Europe and Australasia. “We’ve just woken the kids to go watch the Northern Lights in the back garden! Clearly visible with the naked eye,” the NDTV quotes Iain Mansfield from Hertford, England, as saying.
A preview for a time lapse I have in the works for later.
What an insane show last night! This was at Ballynafagh Church, Kildare.#ireland #auroraborealis #northernlights pic.twitter.com/91R2SgZYVL
— Sryan Bruen Photography (@sryanbruenphoto) May 11, 2024
Similarly, in Tasmania, photographer Sean O’ Riordan described the scene as “absolutely biblical skies” in the early morning hours, compelling him to capture the spectacle before departing the region.
The solar storm prompted authorities to advise caution to satellite operators, airlines and power grid operators, urging them to implement preventive measures against potential disruptions caused by magnetic field fluctuations.
Elon Musk, whose Starlink satellite internet network operates thousands of satellites in low Earth orbit, acknowledged the significance of the solar storm. “Starlink satellites are under a lot of pressure, but holding up so far,” Elon Musk confirmed.
In contrast to solar flares that reach Earth within minutes, CMEs travel at a slower pace, averaging about 800 kilometers (500 miles) per second. The current CMEs originated from a vast sunspot cluster measuring 17 times wider than Earth, coinciding with the Sun’s peak activity cycle every 11 years.
Professor Mathew Owens, specialising in space physics at the University of Reading, encouraged people to observe the night sky for auroras, anticipating a potentially remarkable display. He suggested that individuals equipped with eclipse glasses could also view the sunspot cluster during daylight hours.
The implications of geomagnetic storms extend beyond visual phenomena, with concerns ranging from power grid disruptions to potential impacts on spacecraft and even biological compasses in animals like pigeons.
While the solar storm holds scientific intrigue and visual splendor, authorities underscored the importance of preparedness, urging individuals to maintain emergency supplies and contingency plans in case of unforeseen disruptions, reminiscent of historic solar events like the Carrington Event of 1859, which wreaked havoc on telegraph systems.
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