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The Aurora flares up when charged particles from the the sun interact with the Earth's outer atmosphere. The colours of the Aurora vary based on what layer of the atmosphere is being "excited." The most common colour is an eerie green glow. Those Aurora are caused by the excitement of oxygen atoms about 120 kilometres above the Earth's surface.
Why is it so frequent here? Because the Northwest Territories enjoys crystal-clear skies, ultra-low humidity, and its perfect location beneath the band of maximal Auroral activity – what astronomers call the "Auroral oval."
It’s Canada's wildest lightshow.
Late at night. Far from town. Up at the top of the world. Up in the canvas of the sky. The heavens burst into colour with the most spectacular Northern Lights on Earth, and do a glorious dance.
Sometimes, the Aurora blazes bright violet or crimson. This occurs during Auroral "storms," when charged solar particles penetrate closer to Earth, exciting molecular nitrogen at altitudes as low as 80 kilometres overhead.
These Auroral storms are intense. During especially vivid lightshows, scientists have measured the energy in the Aurora to be as much as 20 million amperes at 50,000 volts. By comparison, home circuit breakers are typically tripped by currents over 15-30 amperes at 120 volts.
Auroral storms happen when the sun ejects charged particles in a blast of "solar wind." These winds hurtle toward Earth at up to 3 million kilometres per hour, bombarding our magnetosphere and sending the Northern Lights into a frenzied dance.
These blasts of solar wind hit the Earth about 1,500 times per year – several times per day, on average. The bigger the blast, the more vivid the Aurora.
For as long as humans have craned their necks to watch the Aurora, they’ve also bent their ears to hear them. Lots of people swear the lights hiss and crackle. For a long time, researchers said they were imagining things. Scientifically speaking, the “noisy Aurora” theory seems mad. After all, the lightshow happens in the soundless void of space. But a few years ago, scientists recorded unamplified sounds including crackles, muffled bangs and distant sputters. Scientists cannot explain this yet - which adds to the the remarkably magical experience of viewing the Aurora from the best vantage point on earth. Follow this link to watch the best Northern Lights in the world!