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G2Peak 26 September 2011 at 15:00 UTC

Northern Lights on 26 September 2011 (Kp 6.3): Where They Were Visible

Kp reached 6.3. At that level the edge of the auroral oval reaches about 53.8° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 49.3°. Activity stayed at storm level (Kp 5 or more) for 18 hours.

03579 G1 G3 Sun 25 Sept 12:00 UTC · Kp 1.33 Sun 25 Sept 15:00 UTC · Kp 2.00 Sun 25 Sept 18:00 UTC · Kp 1.00 Sun 25 Sept 21:00 UTC · Kp 1.00 Mon 26 Sept 00:00 UTC · Kp 1.33 Mon 26 Sept 03:00 UTC · Kp 0.67 Mon 26 Sept 06:00 UTC · Kp 1.00 Mon 26 Sept 09:00 UTC · Kp 1.33 Mon 26 Sept 12:00 UTC · Kp 4.67 Mon 26 Sept 15:00 UTC · Kp 6.33 Mon 26 Sept 18:00 UTC · Kp 6.33 Mon 26 Sept 21:00 UTC · Kp 5.33 Tue 27 Sept 00:00 UTC · Kp 5.67 Tue 27 Sept 03:00 UTC · Kp 4.67 Tue 27 Sept 06:00 UTC · Kp 4.33 Tue 27 Sept 09:00 UTC · Kp 3.00 Tue 27 Sept 12:00 UTC · Kp 3.67 Tue 27 Sept 15:00 UTC · Kp 2.67 Tue 27 Sept 18:00 UTC · Kp 3.33 Tue 27 Sept 21:00 UTC · Kp 4.67 Wed 28 Sept 00:00 UTC · Kp 4.33 Wed 28 Sept 03:00 UTC · Kp 4.67 Mon 26 SeptTue 27 SeptWed 28 Sept
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

5,359 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 1,282 Detroit, Milwaukee, Minneapolis, Saint Paul Cedar Rapids
Canada 879 Toronto, Montreal, Calgary, Ottawa LaSalle
United Kingdom 853 Glasgow, Manchester, Sheffield, Leeds Nottingham
Sweden 474 Stockholm, Gothenburg, Malmö, Uppsala Trelleborg
Finland 454 Helsinki, Espoon keskus, Tampere urban area, Vantaa Hanko
Norway 276 Oslo, Bergen, Trondheim, Stavanger Mandal
Denmark 260 Copenhagen, Aarhus, Odense, Aalborg Alholm
Germany 229 Hamburg, Bremen, Kiel, Lübeck Bremen
Poland 184 Gdańsk, Szczecin, Bydgoszcz, Białystok Bydgoszcz
Ireland 120 Dublin, Limerick, Galway, Tallaght Kilkenny
Latvia 76 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Lithuania 73 Vilnius, Kaunas, Klaipeda City Municipality, Šiauliai Druskininkai
Estonia 65 Tallinn, Tartu, Narva, Pärnu Võru
New Zealand 40 Christchurch, Dunedin, Invercargill, Rolleston Rangiora
Iceland 37 Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær Vík í Mýrdal
Australia 20 Hobart, Launceston, Devonport, Burnie Smithton
Greenland 14 Nuuk, Sisimiut, Ilulissat, Qaqortoq Nanortalik
Faroe Islands 11 Tórshavn, Klaksvík, Hoyvík, Argir Argir
Netherlands 8 Groningen, Leeuwarden, Drachten, Sneek Drachten
Kazakhstan 3 Kostanay, Petropavl, Kokshetau Kostanay
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

4,473 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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