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Geomagnetic Storm Triggers Northern Lights in UK and Ireland

Published 20 January 2026

A powerful geomagnetic storm triggered vivid displays of the Northern Lights across Ireland and much of the United Kingdom on Monday night, captivating stargazers from the Scottish Highlands to southern England and Wales. The aurora borealis, typically confined to high-latitude regions, expanded southward due to a rapid coronal mass ejection from the sun, making it visible as far south as Penzance in Cornwall, Shropshire, Devon and Pembrokeshire.

The event stemmed from a significant solar flare that erupted on Sunday, releasing charged particles that raced toward Earth at unprecedented speed. According to space weather experts, the coronal mass ejection covered the 93 million miles from the sun to Earth in just 25 hours, far quicker than the usual three to four days. Upon arrival late Monday, the particles interacted with Earth's magnetic field, causing the auroral oval to swell and produce the colorful lights. Officials classified the storm as G3 to G5 on the geomagnetic scale, with a Kp index of nine, indicating severe disturbance to the planet's magnetic environment. Measurements from monitoring apps detected spikes exceeding 1,100 nanoteslas, among the highest recorded.

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