Northern Lights dazzle across Europe’s skies from Italy to Bulgaria: Why are they so visible?
The aurora borealis coloured skies from Shetland to Slovenia last night. Here’s where they could be seen - and why they’re brighter this year.
They’re normally the holy grail of a winter holiday, but last night people living in more southern parts of Europe were left awestruck as the Northern Lights visited them at home.
The aurora borealis put on a spectacular display as far south as Italy and Greece thanks to a major geomagnetic storm. In the UK, they stole the show from Bonfire Night fireworks from York to the Isle of Wight.
These vivid ribbons of red, green and magenta are caused by the interaction of particles coming from the sun - known as the solar wind - with the planet’s atmosphere.
When these particles reach the Earth they are channelled by our planet’s magnetic field towards the polar regions.
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Why were the Northern Lights so visible last night?In the northern hemisphere, the Northern Lights are typically only seen over the Arctic Circle - with people booking trips to Norway, Sweden and the Shetland Islands for a glimpse of nighttime magic.
A large eruption on the surface of the sun was observed by solar physicists on Friday, so there was a spike in geomagnetic activity forecast over the weekend.
Auroras usually occur in a band called the annulus (a ring about 3,000 kilometres across) centred on the magnetic pole, the UK’s Met Office explains. The arrival of a Coronal Mass Ejection (CME) - an expulsion of plasma and magnetic field from the outermost layer of the sun’s atmosphere - can cause the annulus to expand.
This brings the aurora to lower latitudes - meaning the lights are visible in the UK and further south in Europe.
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The Northern Lights in the UK, Germany, ItalyStunning photos and sped-up videos of last night’s aurora borealis have flooded in from surprising corners of the continent.
Social media users have shared photos of fantastic magenta skies over Italy on 5 November, from Liguria and Emilia Romagna in the north right down to Puglia.
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A post shared by DOLOMITES Val Gardena | Gröden (@dolomitesvalgardena)
People in Bulgaria, Romania, Slovenia and even Central Macedonia in Greece have shared pictures of the rare phenomenon.
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