AuroraMeteo
EN

G1Peak 17 July 1991 at 21:00 UTC

Northern Lights on 17 July 1991 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 6 hours.

03579 G1 G3 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 Thu 18 Jul 09:00 UTC · Kp 2.00 Thu 18 Jul 12:00 UTC · Kp 3.33 Thu 18 Jul 15:00 UTC · Kp 3.67 Thu 18 Jul 18:00 UTC · Kp 4.33 Thu 18 Jul 21:00 UTC · Kp 4.33 Fri 19 Jul 00:00 UTC · Kp 3.67 Wed 17 JulThu 18 JulFri 19 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

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

CountryPlacesExamplesFurthest from the pole
United Kingdom 167 Glasgow, Edinburgh, Belfast, Newcastle upon Tyne Middlesbrough
Sweden 122 Stockholm, Gothenburg, Malmö, Uppsala Trelleborg
Denmark 93 Copenhagen, Aarhus, Odense, Aalborg Nakskov
Latvia 39 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Canada 26 Winnipeg, Saskatoon, Regina, Thunder Bay Miramichi
Lithuania 25 Kaunas, Klaipeda City Municipality, Šiauliai, Panevėžys Kaunas
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
Norway 20 Kristiansand, Fredrikstad, Sandefjord, Sarpsborg Mandal
Finland 13 Helsinki, Espoon keskus, Lohja, Kirkkonummen keskusta Raseborg
Ireland 2 Letterkenny, Sligo Sligo
Germany 1 Westerland Westerland
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

Only in photos

1,523 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.

← 17 July 1991 · 19 July 1991 →