It's the one thing that's on everyone's bucket list, right? Seeing the Northern Lights? I never thought I'd get the chance. But the day I step off the plane in Anchorage, I'm told the forecast that night is pretty good. I can't believe my luck!

They say if you want to spot the aurora borealis in Alaska, you should go another 400km north to Fairbanks where the skies are often clear, and stay at least three nights — and even then there are no guarantees. I had been trying not to get my hopes up.

But this winter night it's a relatively high 5Kp index and a forecast of clear skies with maximum 7 per cent cloud cover. All of which means the chances of seeing the aurora are pretty good, even in Anchorage. Jet lag be damned.

Northern lights. Photo / Getty Images
Northern lights. Photo / Getty Images

I put on two lots of thermals, a fleece layer, and climb into oversized snow pants and jacket. I stick activated charcoal toe warmers to my thick woollen socks and shove my feet in my boots. Glove liners, gloves, hat, scarf, hand warmers. I'm so trussed up I can hardly move.

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Jody Overstreet runs Alaska Photo Treks, a small business offering Aurora Quest photo tours. She takes groups out away from the city lights and then offers tips for capturing the aurora with whatever camera set-up you have. Although I foolishly forgot to pack mine and suspect my phone camera will prove woefully inadequate.

She picks a small group of us up from our hotels at about 10.30pm and we head north to a remote spot called Eklutna, about half an hour out of town.

Jody explains a bit about how to spot the aurora. It will start out as a faint arc across the sky and then, when it is about to get really active, it will glow brighter and suddenly split off into different strands and start flicking around. The displays usually last about 15 minutes.

She explains some of the science behind it. When charged particles from the sun travel towards Earth in the solar wind, most of them are deflected by our planet's magnetic field.

But, as the field is weaker around the poles, some particles enter the atmosphere there and collide with gases such as oxygen and nitrogen, producing different colours — and stunning displays when seen from the Earth's surface. That's the bit I care about.

Jody also tells us how different peoples through the ages have had different mythologies around the aurora. Occasionally, when solar storms were particularly violent, the aurora could be seen at latitudes as low as the Mediterranean Sea. When activity was that strong, it could take on a red tinge and the Romans of ancient times saw that as a bad omen. It must have been terrifying seeing the horizon glow red at night. But the peoples living near the Arctic circle saw the aurora more often and had more benevolent stories. For some Native Alaskans it was the spirits of their ancestors dancing. For others it was a group of walruses kicking around a ball.

The woman in the front seat yells "There it is!". She points and the rest of us crane to see it through the windscreen. But, try as I might, I can't spot it. The side windows are fogged up and the only green lights I can see are reflections from the dashboard. So tantalisingly close. But still it bodes well for our evening viewing.

Soon enough we come to the wooded spot and park before trudging single file through the snow — a sneaky trick to get us moving and warmed up in the —10C temperatures. Jody's headlight casts an eerie glow among the bare trees, illuminating clumps of snow clinging to the branches.

After about 15 minutes of walking we come to a clearing. "Don't go too far down, you don't want to fall into the icy river," Jody warns as she lights a small campfire in a hollow in the snow. As everyone sets up their tripods, I wander away to find a good spot and take a few test shots with my phone. They come up black. Humph.

The skies are pretty clear apart from a faint white smudge near the horizon — it could be the start of an aurora! Or it could be cloud or even just mist rising from the river, it's hard to tell. I take my glasses off and try to wipe the lenses — they've fogged up from my breathing into my scarf to try to keep my face warm. In the end, I put them in my pocket next to my phone.

Alaska. Photo / Getty Images
Alaska. Photo / Getty Images

Staring at the sky, I try to pick out constellations from the brightest stars but, apart from Orion's Belt, they're all unfamiliar northern ones. An American woman points out the Big Dipper to me and a shooting star streaks across the sky.

Then that white smudge on the horizon slowly forms into an arc and disappears again. It's almost as if it's teasing us. I can hear the fire crackling as sparks fly into the air, snow creaking beneath our boots, a train in the distance. Jody shares a few more tips for the photographers — set it for a longer exposure so you capture as much light as possible; use the silhouetted trees as a reference point; don't worry about the light from the moon, it will only make the snow show up brighter and the contrast will be more stark. And still that smudge fades in and out.

Until someone points out that it has started to glow. All eyes are glued to it now, waiting to see what it will do. A vertical line of white light slowly extends up from the smudge.

Then another. Faint at first, then becoming more defined.

It's the aurora but it's not as green as I thought it would be. Jody explains that the camera picks up more light than the naked eye which is why it's so green in all the photos you see. Then it disappears again. I'm a bit underwhelmed. Is that it? I thought it would be more spectacular.

But Jody's unfazed. You have to be patient, she says. "We say the best time to see the aurora is half an hour after you go to bed," she laughs. So we gather around the fire, cradling hot chocolate in polystyrene cups, trying to warm our hands.

But after another half hour of futile sky-scanning, Jody announces we'll try another spot.

She drives us to an old rail bridge over the Knik River. A whisper of cloud sits over the mountains at the far bank. Everyone gets their tripods out and trains their lenses on the cloud anyway, hoping it will lift.

Then, while everyone is peering at their screens and focusing their cameras, I look up and there it is! Patches of white light flickering across the sky overhead. I stand there silent and as still as I can, not wanting to interrupt the magic of it.

The light flashes and disappears as if giants are dancing around a huge campfire and I'm watching from a distance, the moving bodies casting odd shadows.

Then it spreads until the whole sky is pulsing with light.

The others have noticed now too and there's a muted chorus of "oh my" and "wow". We are watching this visual symphony being played out on a grand stage. It is too vast to take in — I start to get a crick in my neck from stretching back to watch it, but I can't take my eyes off it. Then it begins to split. Vertical shafts of green light shoot up like a bad 80s laser show. Spires, Jody calls them, like a Disney castle. In the background, the river of light ripples across the sky.

It is truly spectacular. And I am moved thinking that this magnificence has been lighting up the northern skies for millennia — long before we were around to appreciate it. I feel rather small in the context of time and space and have to blink back tears. As I squeeze my eyes shut, the ice on my eyelashes melts away.

"It never gets old," Jody says, reverently. "It's different every time and knowing the science behind it doesn't diminish the magic of it."

I can imagine that. I've only been watching it for half an hour and I want to stay up all night and every night I'm here, gazing at the sky.

Eventually I start to lose the feeling in my toes and I'm forced to retreat to the van to warm up. As I climb into bed later I can still see it flashing in my mind — frustrating in its capriciousness but in the end utterly enchanting. I wouldn't have missed it for the world.

The aurora borealis. Photo / 123RF
The aurora borealis. Photo / 123RF
NEED TO KNOW

What:

See the Northern Lights.

When: Visit Alaska during aurora season between August 21 and April 21.

Where: Go to Fairbanks or Anchorage and try to get away from the city lights if possible.

In Anchorage: Alaska Photo Treks, Aurora Quest.

In Fairbanks: Many local operators run aurora tours and hotels offer aurora wake-up calls. Try Chena Hot Springs Resort, Snow Coach Aurora Tour.

More info: Check the aurora forecast at gi.alaska.edu. The Geophysical Institute at the University of Alaska Fairbanks gives you the Kp index and where the aurora will be visible. The Kp index rates geomagnetic activity between 0 and 9 so the higher the number, the more activity and the lower the latitudes (in the Northern Hemisphere) it is possible to see it.

CHECKLIST
Getting there: Alaska Air flies direct to Anchorage from many US cities including Los Angeles, Las Vegas, Seattle, Portland and Honolulu. United Airlines flies from New Zealand to Los Angeles, Las Vegas and San Francisco on the west coast of the United States.

Details: For the best times to see the Northern Lights and other regional activities go to anchorage.net.