Northern Lights hit 100-year low point
Sunday 03 October 2010
The Northern Lights have petered out during the second half of this decade, becoming rarer than at any other time in more than a century, the Finnish Meteorological Institute said Tuesday.
The Northern Lights, or aurora borealis, generally follow an 11-year "solar cycle", in which the frequency of the phenomena rises to a maximum and then tapers off into a minimum and then repeats the cycle.
"The solar minimum was officially in 2008, but this minimum has been going on and on and on," researcher Noora Partamies told AFP.
"Only in the past half a year have we seen more activity, but we don't really know whether we're coming out of this minimum," she added.
The Northern Lights, a blaze of coloured patterns in the northern skies, are triggered by solar winds crashing into the earth and being drawn to the magnetic poles, wreaking havoc on electrons in the parts of the atmosphere known as the ionosphere and magnetosphere.
So a dimming of the Northern Lights is a signal that activity on the sun which causes solar winds, such as solar flares and sun sports, is also quieting down.
For researchers like Partamies, it is the first time they can observe through a network of modern observation stations what happens to this solar cycle when it becomes as badly disrupted as it is now.
"We're waiting to see what happens, is the next maximum going to be on time, is it going to be late, is it going to be huge?" Partamies said.
During the cycle's peak in 2003, the station on Norway's Svalbard island near the North Pole, showed that the Northern Lights were visible almost every single night of the auroral season, which excludes the nightless summer months.
That figure has fallen to less than 50y percent, while the southernmost station, situated in southern Finland, has been registering only two to five instances annually for the past few years.
The Independent travel offers: Discover a world of inspiring destinations
- 2 Tower Bridge glass walkway 'smashed' by night-time visitor dropping bottle of beer
- 4 Woman opens professional cuddling shop – gets 10,000 customers in first week
- 5 Grayson Perry: London needs affordable housing because 'rich people don't create culture'
Rochester by-election: Ukip gains second MP as Tory defector Mark Reckless holds seat
'Beast of Bolsover' Dennis Skinner takes Ukip MP Mark Reckless to task moments after he is sworn in
Rochester by-election: Labour MP Emily Thornberry resigns after posting white van and England flags tweet
France 'blocks' Russian sailors from boarding a warship
Rochester aftermath: Sacking of Emily Thornberry will make work of Labour MPs '10 times harder'
Revealed: How the world gets rich – from privatising British public services
£8 per hour: Recruitment Genius: Excellent opportunities are available for par...
£60000 - £75000 per annum + Benefits : Investigo: A global leading travel busi...
£16000 - £20000 per annum: Recruitment Genius: This charming and contemporary ...
£15000 - £20000 per annum: Recruitment Genius: The fastest growing fitness cha...