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G3Peak 25 October 2011 at 00:00 UTC

Northern Lights on 25 October 2011 (Kp 7.3): Where They Were Visible

Kp reached 7.3. At that level the edge of the auroral oval reaches about 51.8° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 47.3°. Activity stayed at storm level (Kp 5 or more) for 15 hours.

03579 G1 G3 Sun 23 Oct 18:00 UTC · Kp 0.67 Sun 23 Oct 21:00 UTC · Kp 1.00 Mon 24 Oct 00:00 UTC · Kp 1.67 Mon 24 Oct 03:00 UTC · Kp 0.33 Mon 24 Oct 06:00 UTC · Kp 1.67 Mon 24 Oct 09:00 UTC · Kp 0.67 Mon 24 Oct 12:00 UTC · Kp 0.33 Mon 24 Oct 15:00 UTC · Kp 1.00 Mon 24 Oct 18:00 UTC · Kp 5.33 Mon 24 Oct 21:00 UTC · Kp 7.00 Tue 25 Oct 00:00 UTC · Kp 7.33 Tue 25 Oct 03:00 UTC · Kp 5.67 Tue 25 Oct 06:00 UTC · Kp 4.67 Tue 25 Oct 09:00 UTC · Kp 3.00 Tue 25 Oct 12:00 UTC · Kp 3.00 Tue 25 Oct 15:00 UTC · Kp 2.00 Tue 25 Oct 18:00 UTC · Kp 1.33 Tue 25 Oct 21:00 UTC · Kp 0.67 Wed 26 Oct 00:00 UTC · Kp 0.67 Wed 26 Oct 03:00 UTC · Kp 1.33 Wed 26 Oct 06:00 UTC · Kp 0.67 Mon 24 OctTue 25 OctWed 26 Oct
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

3,918 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 1,635 New York City, Brooklyn, Chicago, Queens Lexington
United Kingdom 657 London, Birmingham, Glasgow, Manchester Basingstoke
Canada 407 Toronto, Montreal, Calgary, Ottawa Eastern Passage
Germany 261 Berlin, Hamburg, Essen, Dortmund Leipzig
Poland 196 Warsaw, Łódź, Poznań, Gdańsk Lublin
Sweden 148 Stockholm, Gothenburg, Malmö, Uppsala Trelleborg
Netherlands 138 Rotterdam, Amsterdam, The Hague, Utrecht Venlo
Finland 123 Helsinki, Espoon keskus, Tampere urban area, Vantaa Raseborg
Denmark 94 Copenhagen, Aarhus, Odense, Aalborg Nykøbing Falster
Norway 77 Oslo, Bergen, Trondheim, Stavanger Mandal
Ireland 55 Dublin, Cork, Limerick, Galway Cork
Latvia 39 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Lithuania 31 Vilnius, Kaunas, Klaipeda City Municipality, Šiauliai Druskininkai
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
Iceland 18 Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær Vík í Mýrdal
Greenland 6 Nuuk, Sisimiut, Ilulissat, Qaqortoq Qaqortoq
Faroe Islands 4 Tórshavn, Klaksvík, Fuglafjørður, Miðvágur Tórshavn
Kazakhstan 4 Astana, Kostanay, Petropavl, Kokshetau Astana
Belgium 3 Turnhout, Knokke-Heist, Kapellen Turnhout
Svalbard & Jan Mayen 1 Longyearbyen Longyearbyen
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

Only in photos

2,280 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.

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