G1Peak 31 December 1999 at 21:00 UTC
Northern Lights on 31 December 1999 at 21:00 UTC (Kp 5.3): Where They Were Visible
Kp reached 5.3. At that level the edge of the auroral oval reaches about 55.8° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 51.3°. Activity stayed at storm level (Kp 5 or more) for 12 hours.
Kp 0–3 Kp 4 Kp 5–6 (G1–G2) Kp 7+ (G3+) Times in UTC; faded bars are forecasts.
Three-hourly Kp from GFZ, one day either side of the storm.
Where the aurora could be seen
1,694 towns on our list had enough activity while it was dark there. Cloud cover is not included.
Only in photos
1,792 more towns could have caught a faint red or green glow low on the horizon with a phone or camera.
Whether the aurora was actually seen also depended on the weather. Use this as a guide to where it was possible.