The Northern Lights in Scotland
Scotland’s Most Authentic Mystery
The Loch Ness monster is Scotland’s most enduring mystery, however the Northern Lights “Aurora Borealis”…the name of a light phenomenon often seen in the more northern regions of Scotland is “the most authentic mystery”, Because with good timing you are certain to see them annually during the crisp clear winter months early spring and late Autumn months. The lights have been around since the Earth formed an atmosphere, the Dinosaurs saw them, early humans saw them and our descendants will also see them. The scientific name for the phenomenon is “Aurora Borealis”, the Aurora for short. We are currently within a maximum solar cycle peak forecast promising the chance of extra special light shows
What Causes the Northern lights
Auroral mechanism Auroras are now known to be caused by the collision of charged particles (e.g. electrons), found in the magnetosphere, with atoms in the Earth’s upper atmosphere (at altitudes above 80 km) These charged particles are typically energized to levels between 1 thousand and 15 thousand electronvolts and as they collide with atoms of gases in the atmosphere, the atoms become energized. Shortly afterwards, the atoms emit their gained energy as light (see Fluorescence). Light emitted by the Aurora tends to be dominated by emissions from atomic oxygen, resulting in a greenish glow (at a wavelength of 557.7 nm) and – especially at lower energy levels and at higher altitudes – the dark-red glow (at 630.0 nm of wavelength). Both of these represent forbidden transitions of electrons of atomic oxygen that, in absence of newer collisions, persist for a long time and account for the slow brightening and fading (0.5-1 s) of auroral rays. Many other colors – especially those emitted by atomic and molecular nitrogen (blue and purple, respectively) – can also be observed. These, however, vary much faster and reveal the true dynamic nature of auroras. As well as visible light, auroras emit infrared (NIR and IR) and ultraviolet (UV) rays as well as X-rays (e.g. as observed by the Polar spacecraft). While the visible light emissions of auroras can easily be seen on Earth, the UV and X-ray emissions are best seen from space, as the Earth’s atmosphere tends to absorb and attenuate these emissions.
What do the Northern lights look like?
Typically the aurora appears either as a diffuse glow or as “curtains” that approximately extend in the east-west direction. At some times, they form “quiet arcs”; at others (“active aurora”), they evolve and change constantly. Each curtain consists of many parallel rays, each lined up with the local direction of the magnetic field lines, suggesting that aurora is shaped by the earth’s magnetic field. Indeed, satellites show auroral electrons to be guided by magnetic field lines, spiraling around them while moving earthwards. The earth is constantly immersed in the solar wind, a rarefied flow of hot plasma (gas of free electrons and positive ions) emitted by the sun in all directions, a result of the million-degree heat of the sun’s outermost layer, the solar corona
The solar wind usually reaches Earth with a velocity around 400 km/s, density around 5 ions/cc and magnetic field intensity around 2-5 nT (nanoteslas; the earth’s surface field is typically 30,000-50,000 nT). These are typical values. During magnetic storms, in particular, flows can be several times faster; the interplanetary magnetic field (IMF) may also be much stronger. The IMF originates on the sun, related to the field of sunspots, and its field lines (lines of force) are dragged out by the solar wind. That alone would tend to line them up in the sun-earth direction, but the rotation of the sun skews them (at Earth) by about 45 degrees, so that field lines passing Earth may actually start near the western edge (“limb”) of the visible sun a numerical simulation of the solar wind illustrates that: Solar wind forecast. The Far North of Scotland has the same latitude as Moscow (Russia) and Stavenger (Norway) but is more easily accessible. It’s advantage of Northern latitude along with the complete absence of street lamps mean regular sightings of the Northern lights “Aurora Borealis” With good timing you have a chance of experiencing one of the world’s most magnificent natural phenomena: the Northern Lights. The Northern night sky dancing with red, yellow, green, blue and violet streamers, arcs and rays. The best time to see the Northern lights are the crisp, clear winter nights from September through to April between 10 pm and 3 am
Accommodation to see the Northern Lights
Far North Cottage, Dunnet Head – This unique former Croft Cottage sleeps up to 6 and is the furthest North Detached Cottage on the Scottish mainland, enjoying spectacular open views of the Pentland firth, Scapa flow and Orkney Isles. All Luxuries including master bedroom with en-suite bathroom featuring observation skylight windows, Jacuzzi baths, Sauna and free WIFI. Full Electric heating, Coal / Wood Stove and Conservatory for the clear Sea views and Night Sky watching, perfect for Aurora Watching.
Next available Week Commencing 31st October 2015 – Click here for full information
Sea View Cottage, Navidale – This unique detached Luxury crofters cottage sits high in the Sutherland Hills sleeping up to 6 and enjoys a Remote feel in a most elevated position with Conservatory, Jacuzzi bath, Sauna, Full Central Heating, Open fire and WIFI. Sea View is easily accessible by car, or public transport even in the winter, with spectacular elevated views of the North Sea, Mountains and Night skies, perfect for Aurora Watching.
Next available Week Commencing 29th August 2015 – Click here for full information
Rowantree Cottage Isle of Skye – This unique setached former croft cottage sits high in Hills of North West Isle of Skye sleeping 4 up to people “accessed by toll free road bridge” on the spectacular Waterish peninsular. This cottage enjoys many Luxuries including free WIFI, Jacuzzi bath, Full Electric Heating, Supplementary Wood burner and Conservatory “North West facing” with breathtaking unrestricted Sea and Sky Views perfect for Aurora Watching.
Next available 7 Nights 29th August 2015 – Click here for full information
Whale Cottage Whitehills – This Beautiful detached Cottage sleeps up to 6 and is so close to the sea you actually feel within it. Whale Cottage sits gable end onto the sea wall and at high tide the waves lap within feet of the cottage. There are sea views from most rooms perfect for Aurora Watching and passing whales or dolphins. Click here for full information
Availability enquiry for rental Cottages ideally placed to view the Northern Lights
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What Causes the Northern lights – continued
The earth’s magnetosphere is the space region dominated by its magnetic field. It forms an obstacle in the path of the solar wind, causing it to be diverted around it, at a distance of about 70,000 km (before it reaches that boundary, typically 12,000-15,000 km upstream, a bow shock forms). The width of the magnetospheric obstacle, abreast of Earth, is typically 190,000 km, and on the night side a long “magnetotail” of stretched field lines extends to great distances.When the solar wind is perturbed, it easily transfers energy and material into the magnetosphere. The electrons and ions in the magnetosphere that are thus energized move along the magnetic field lines to the polar regions of the atmosphere causing the aurora. The aurora is a common occurrence in the ring-shaped zone. It is occasionally seen in temperate latitudes, when a strong magnetic storm temporarily expands the auroral oval. Large magnetic storms are most common during the peak of the eleven-year sunspot cycle or during the three years after that peak. However, within the auroral zone the likelihood of an aurora occurring depends mostly on the slant of IMF lines (known as Bz, pronounced “bee-sub-zed” or “bee-sub-zee”), being greater with southward slants. Geomagnetic storms that ignite auroras actually happen more often during the months around the equinoxes. It is not well understood why geomagnetic storms are tied to the earth’s seasons when polar activity is not. It is known, however, that during spring and autumn, the earth’s and the interplanetary magnetic field link up. At the magnetopause, Earth’s magnetic field points north. When Bz becomes large and negative (i.e., the IMF tilts south), it can partially cancel Earth’s magnetic field at the point of contact. South-pointing Bz’s open a door through which energy from the solar wind can reach Earth’s inner magnetosphere. The peaking of Bz during this time is a result of geometry. The interplanetary magnetic field comes from the sun and is carried outward the solar wind. Because the sun rotates the IMF has a spiral shape. Earth’s magnetic dipole axis is most closely aligned with the Parker spiral in April and October. As a result, southward (and northward) excursions of Bz are greatest then. However, Bz is not the only influence on geomagnetic activity. The Sun’s rotation axis is tilted 8 degrees with respect to the plane of Earth’s orbit. Because the solar wind blows more rapidly from the sun’s poles than from its equator, the average speed of particles buffeting Earth’s magnetosphere waxes and wanes every six months. The solar wind speed is greatest — by about 50 km/s, on average — around September 5 and March 5 when Earth lies at its highest heliographic latitude. Still, neither Bz nor the solar wind can fully explain the seasonal behavior of geomagnetic storms. Those factors together contribute only about one-third of the observed semiannual variation.
The Northern Lights in Scotland – Map of the best viewing areas
Northern Lights in Scotland – Aurora Borealis Forecast 2015 / 2016
The best tool available for predicting when the Northern Lights are most likely to appear is the Aurora Hunter Other previous articles of note covering sightings of the Northern Lights in Scotland include STV Scotland, Channel 4, The Washington Post
Planets, Stars, Comets and the Night Sky
Those simply looking for Planet’s, Star’s and Night sky gazing can maximise their outlook and viewing pleasure by heading to Remote or clear Coastal areas of Northern Scotland – Please go to dedicated page Sky Watching Holidays in Scotland
More useful Links for Northern Lights – Aurora Borealis Hunters
The Aurora Live up to date forecast and activity page Daily Aurora Forecast – brought to you by the Geophysical Institute The Aurora Page Information, links and images about the Aurora Borealis or Northern Lights
Real Northern Lights Stories – from previous Guests
At 10pm on Wednesday 29th March on a crystal clear night we saw the “Northern Lights” They were amazing. They lasted 45 minutes before the sky faded back to black. What a fantastic holiday! Thank you so much – we’d like to come back soon – Paul, Anne, Lauri, Mark and Fergal March 2011 is 2nd visit in 2 months ! Flew and stayed here in January 16th to 23rd and on the 18th January 2011 we saw the “Northern Lights” Started as a Glow over the Spinney then turned Yellow and Orange pulsating Lights. It was amazing, they returned at 9pm that evening and again at 1am next morning. Nothing this time but the night skies were still amazing. The full moon rose in the SE 9pm 22nd March and 10pm 23rd March – bright orange and so clear. We felt we could reach up and touch the stars, it was fantastic – Keith and Kathy Clark, Warwickshire
More Great Self Catering Locations to see the Northern Lights
Sea View Log Cabins 600 foot elevated location sleeps 4 and 6 – Moray Firth The Secret Retreat Log Cabin in Aberdeenshire – with Private Hot Tub – Moray Firth Northern Lights Group Accommodation Luxury Cottage for up to 9 people – Moray Firth Remote Luxury Detached Cottage in Ross-shire sleeps 4 – See Aurora Borealis Scotland Soundwaves enjoys spectacular sea views and sleeps up to 8 people – Shoreside Holiday Cottage Moray Creel Cottage Portsoy – This Moray Firth North Coast Cottage enjoys stunning North Sea views and sleeps 6 Live Booking and Availability – Top 3 most popular Self Catering Cottage Listings