Canadians may witness another stunning northern lights display tonight, following a surge of fast-moving particles from the sun towards Earth. In recent days, the sun has been quite active, emitting magnetic energy from sunspots and releasing three coronal mass ejections (CMEs).
These CMEs are rapidly traveling along the solar wind towards our planet, potentially merging into a phenomenon known as a “cannibal” CME. When these particles interact with Earth’s magnetic field, they create the mesmerizing spectacle of the northern lights, or aurora borealis.
While the northern lights are typically seen in northern latitudes, a strong enough CME could extend the display further south. A previous instance of this occurred on May 10, 2024, when the northern lights were visible as far south as the Caribbean due to a cannibal CME.
The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC) has forecasted a significant geomagnetic storm for tonight and into Friday. Geomagnetic storms are rated on a scale from G1 to G5.
According to the SWPC, a combined CME arrival is expected around mid-afternoon EDT on June 4, with potential G3 storm levels afterwards. The CME passage could continue into the evening and possibly overnight hours of June 5.
Predicting the northern lights can be challenging, but the SWPC expresses a fair level of confidence in their arrival while remaining uncertain about the intensity. The SWPC mentions that the intensity of the display is uncertain due to the complex nature of the observed CMEs, with a consensus around G3 storm levels and a possibility of reaching G4.
The remarkable northern lights displays in May and October 2024 resulted from G5 storm levels. To catch a glimpse of the northern lights, certain conditions must align, such as the auroral hole dipping south along the CME’s path and the storm occurring during nighttime.
For optimal viewing, seek dark skies away from city lights. You can also attempt to capture the northern lights with your phone, even if you cannot see them directly. Various apps like Aurora Now can provide information on the visibility of the aurora from your location.
To enhance your viewing experience, look west after sunset to witness a beautiful pairing of Jupiter and Venus in the sky.
