First, check the Kp index. This is a scale from 0 to 9 that measures geomagnetic activity. For the UK, you need a Kp of 5 or higher for Scotland, and 7 or higher for southern regions. Think of it as the aurora’s “hype level.”
Second, look north. The aurora often starts as a faint grey-green glow on the horizon. It might look like a cloud, but if it’s twinkling or shifting, that’s your sign. Don’t expect a neon explosion—sometimes it’s subtle, like God’s mood lighting.
Third, use your camera. Your phone’s night mode can pick up colours your eyes miss. Seriously, point your iPhone at a dim sky, and suddenly you’re seeing green streaks. It’s like magic, but it’s actually just science and a good lens.
