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G4Peak 8 September 2017 at 12:00 UTC

Northern Lights on 8 September 2017 (Kp 8.3): Where They Were Visible

Kp reached 8.3. At that level the edge of the auroral oval reaches about 49.8° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 45.3°. Activity stayed at storm level (Kp 5 or more) for 24 hours.

03579 G1 G3 Wed 6 Sept 21:00 UTC · Kp 3.33 Thu 7 Sept 00:00 UTC · Kp 2.67 Thu 7 Sept 03:00 UTC · Kp 3.67 Thu 7 Sept 06:00 UTC · Kp 3.67 Thu 7 Sept 09:00 UTC · Kp 3.67 Thu 7 Sept 12:00 UTC · Kp 2.67 Thu 7 Sept 15:00 UTC · Kp 2.00 Thu 7 Sept 18:00 UTC · Kp 2.67 Thu 7 Sept 21:00 UTC · Kp 7.67 Fri 8 Sept 00:00 UTC · Kp 8.00 Fri 8 Sept 03:00 UTC · Kp 4.67 Fri 8 Sept 06:00 UTC · Kp 4.33 Fri 8 Sept 09:00 UTC · Kp 5.00 Fri 8 Sept 12:00 UTC · Kp 8.33 Fri 8 Sept 15:00 UTC · Kp 7.33 Fri 8 Sept 18:00 UTC · Kp 6.33 Fri 8 Sept 21:00 UTC · Kp 4.67 Sat 9 Sept 00:00 UTC · Kp 2.33 Sat 9 Sept 03:00 UTC · Kp 1.67 Sat 9 Sept 06:00 UTC · Kp 0.33 Sat 9 Sept 09:00 UTC · Kp 0.33 Sat 9 Sept 12:00 UTC · Kp 0.67 Sat 9 Sept 15:00 UTC · Kp 0.33 Sat 9 Sept 18:00 UTC · Kp 0.00 Sat 9 Sept 21:00 UTC · Kp 0.00 Thu 7 SeptFri 8 SeptSat 9 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

4,336 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 1,581 New York City, Brooklyn, Chicago, Queens Clarksville
United Kingdom 710 London, Birmingham, Glasgow, Manchester Falmouth
Canada 406 Toronto, Montreal, Calgary, Ottawa Eastern Passage
Germany 391 Berlin, Hamburg, Köln, Düsseldorf Bad Homburg vor der Höhe
Poland 284 Warsaw, Wrocław, Łódź, Poznań Rzeszów
Sweden 148 Stockholm, Gothenburg, Malmö, Uppsala Trelleborg
Netherlands 147 Rotterdam, Amsterdam, The Hague, Utrecht Maastricht
Finland 123 Helsinki, Espoon keskus, Tampere urban area, Vantaa Raseborg
Belgium 101 Brussels, Antwerp, Ghent, Charleroi Charleroi
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
New Zealand 30 Christchurch, Wellington, Dunedin, Lower Hutt Whanganui
Australia 24 Melbourne, Adelaide, Geelong, Hobart Tuggeranong
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
France 21 Lille, Roubaix, Tourcoing, Dunkirk Maubeuge
Iceland 18 Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær Vík í Mýrdal
Czechia 12 Liberec, Hradec Králové, Ústí nad Labem, Most Hradec Králové
China 7 Daxing’anling, Jiagedaqi District, Genhe, Oroqen Zizhiqi Jiagedaqi District
Greenland 6 Nuuk, Sisimiut, Ilulissat, Qaqortoq Qaqortoq
Faroe Islands 4 Tórshavn, Klaksvík, Fuglafjørður, Miðvágur Tórshavn
Kazakhstan 4 Astana, Kostanay, Petropavl, Kokshetau Astana
Ukraine 2 Kyiv, Kharkiv Kharkiv
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

Only in photos

2,005 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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