Tonight (October 23rd), a G4 severe geomagnetic storm is impacting Earth and will create spectacular displays of Aurora Australis in southern regions of Australia. This storm was initiated by a coronal mass ejection (CME) from the sun, and if you’re in southern Australia, it would be worthwhile to take your camera to see this spectacular display.
Geomagnetic storms occur when blasts of solar energy strike the Earth’s magnetic field, causing high-energy particles to interact with gases present in the atmosphere. This produces glowing bands of green, purple, and red as they are charged by the bombardment of solar energy. According to the Bureau of Meteorology, southern Australia is currently experiencing G4 conditions, with the potential to reach G5 levels, which means that southern lights may be visible further north into New South Wales, Victoria, Tasmania and other southern dietricts. A peak viewing of this spectacular display should occur between 10 PM and 2 AM local time, and as always, the best viewing will occur away from city lights.
While it may be a sight to behold, it is important to note that the potential for significant disruptions exist for power grids, satellites, and HF radio communications. Therefore, insurers and other technology companies are on alert to assess damage from the effects of the G4 storm. However, for stargazers and photographers alike, witnessing this rare (one of the largest solar storms in years) display is worth every effort and compares to fireworks displays. If you are in a southern state, it would be prudent to look for clear skies and check the forecast on such apps as the Bureau of Meteorology (BOM) before heading out to shoot your photos.
