Scientists monitoring solar activity believe a mass ejection of particles from the sun during the last two days could mean people in some parts of Britain are treated to a rare glimpse of the Northern Lights this evening.
The Aurora Borealis, or the Northern Lights, is caused by the collision of energetic charged particles with atoms in the high altitude atmosphere. Researchers say the sun fired out a coronal mass ejection (CME) two days ago into space, which is sending a "modestly" strong solar flare towards earth, and this in turn is expected to cause a geomagnetic storm.
This could allow people in the north of the UK to see the aurora tonight and possibly tomorrow evening.
The NOAA NWS Space Weather Prediction Center said on their Facebook page a CME was still approaching, but they could not predict an exact time people could expect to see the aurora.
Professor Jim Wild, a space scientist at Lancaster University said there was a reasonable chance of seeing the aurora tonight - providing the weather is calm and skies are clear.
"It normally sits on the edge of the arctic circle in northern Norway. For it to come down to the UK you need a lot of solar activity" he explained. "It should arrive at around midnight tonight - plus or minus a few hours.
"But if the geomagnetic storm is weak, it could push the aurora further south."
Dr Steve Marple, a researcher at Lancaster University and a member of the Aurora Watch UK research team said the further north in Britain people are, the better chance they have of seeing the aurora.
He advised: "You want to find somewhere dark, away from street lights and somewhere with good views to the north such as up a hill, so that the northern horizon is lower."
In 2013, Nasa predicted winter would be another "solar maximum", meaning increased cosmic activity and better chances of seeing those notoriously elusive displays of ethereal red and green lights.
For real-time aurora alerts and geomagnetic activity, visit http://aurorawatch.lancs.ac.uk/.