This weekend, stargazers across Canada could be in for an incredible spectacle as two powerful solar flares are unleashing their energy toward Earth, promising to create vibrant displays of the northern lights, also known as the aurora borealis.

The Space Weather Prediction Center, part of the U.S. National Oceanic and Atmospheric Administration (NOAA), has issued a geomagnetic storm watch from October 4 to 6. This is due to recent coronal mass ejections (CMEs) that are expected to amplify the auroras visible in many parts of the country.

Experts indicate that this year's aurora activity is particularly robust, coinciding with the sun's magnetic cycle peak, which occurs approximately every 11 years. “So far, this solar cycle has exceeded expectations, and we haven't even reached its maximum yet,” noted David Knudsen, head of the physics and astronomy department at the University of Calgary, during an interview on Thursday.

Recent observations highlighted one of the strongest solar flares recorded in years, an X7 event followed by an even more impressive X9 on Thursday – the most intense since 2017. These solar flares, classified from B (too weak to affect Earth) to X (capable of causing global radio blackouts), can trigger geomagnetic storms, which are rated from G1 to G5 based on their strength. The anticipated storm this weekend is rated at G3, meaning it could cause some power grid fluctuations but is primarily an opportunity for spectacular light shows.

Aurora enthusiasts are eagerly watching the skies. Chris Ratzlaff, a seasoned aurora chaser, estimates a 35% chance of visibility in Calgary, particularly during the afternoon and evening on Friday and into the early morning on Saturday. NOAA’s forecasts point to the highest likelihood of sightings stretching from the Northern Territories down through British Columbia to Quebec, although southern Ontario and parts of the Maritimes might miss out on the best views.

While the storm could lead to concerns regarding power grids, it simultaneously stirs excitement among sky watchers. NOAA spokesperson Erica Grow Cei cautioned that there remains some uncertainty regarding the intensity of the storms, emphasizing that the conditions might fluctuate.

“It’s worth taking a look at the sky over the next few nights,” Ratzlaff advised. “With the X9 flare’s effects, we could see activity well into the weekend. Grab your cameras and get to dark spots for the best sightings!”

This striking phenomenon isn’t new for Canada. Earlier this year, unusually strong solar storms in May dazzled observers across the Northern Hemisphere with breathtaking auroras. While NOAA mentions that this weekend's displays might not be as vibrant as those in May due to fewer ejections of high-energy plasma, the potential for an unforgettable night under the stars remains high.

So, mark your calendars and keep your eyes peeled – this weekend could offer one of the most spectacular natural shows you won’t want to miss!