AuroraMeteo
EN

G2Peak 17 July 1991 at 00:00 UTC

Northern Lights on 17 July 1991 at 00:00 UTC (Kp 5.7): Where They Were Visible

Kp reached 5.7. At that level the edge of the auroral oval reaches about 55.2° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 50.7°. Activity stayed at storm level (Kp 5 or more) for 15 hours.

03579 G1 G3 Mon 15 Jul 15:00 UTC · Kp 1.33 Mon 15 Jul 18:00 UTC · Kp 2.33 Mon 15 Jul 21:00 UTC · Kp 1.33 Tue 16 Jul 00:00 UTC · Kp 2.67 Tue 16 Jul 03:00 UTC · Kp 2.33 Tue 16 Jul 06:00 UTC · Kp 1.33 Tue 16 Jul 09:00 UTC · Kp 1.33 Tue 16 Jul 12:00 UTC · Kp 2.00 Tue 16 Jul 15:00 UTC · Kp 5.00 Tue 16 Jul 18:00 UTC · Kp 5.33 Tue 16 Jul 21:00 UTC · Kp 4.33 Wed 17 Jul 00:00 UTC · Kp 5.67 Wed 17 Jul 03:00 UTC · Kp 5.33 Wed 17 Jul 06:00 UTC · Kp 5.33 Wed 17 Jul 09:00 UTC · Kp 3.33 Wed 17 Jul 12:00 UTC · Kp 3.33 Wed 17 Jul 15:00 UTC · Kp 4.00 Wed 17 Jul 18:00 UTC · Kp 4.00 Wed 17 Jul 21:00 UTC · Kp 5.33 Thu 18 Jul 00:00 UTC · Kp 4.67 Thu 18 Jul 03:00 UTC · Kp 2.33 Thu 18 Jul 06:00 UTC · Kp 1.67 Tue 16 JulWed 17 JulThu 18 Jul
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

1,328 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 568 Seattle, Detroit, Milwaukee, Minneapolis Cedar Rapids
Canada 383 Toronto, Montreal, Calgary, Ottawa LaSalle
United Kingdom 167 Glasgow, Edinburgh, Belfast, Newcastle upon Tyne Middlesbrough
Sweden 97 Stockholm, Gothenburg, Uppsala, Linköping Halmstad
Denmark 28 Odense, Aalborg, Esbjerg, Kolding Nakskov
Latvia 27 Riga, Jelgava, Jūrmala, Ventspils Jelgava
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
Norway 15 Kristiansand, Fredrikstad, Sandefjord, Sarpsborg Mandal
New Zealand 9 Dunedin, Invercargill, Mosgiel, Wānaka Wānaka
Australia 7 Hobart, Launceston, Devonport, Burnie Burnie
Finland 2 Raseborg, Ekenäs Raseborg
Ireland 2 Letterkenny, Sligo Sligo
Germany 1 Westerland Westerland
Kazakhstan 1 Petropavl Petropavl
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

Only in photos

2,688 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.

← 13 July 1991 · 17 July 1991 →