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G2Peak 21 October 2003 at 21:00 UTC

Northern Lights on 21 October 2003 (Kp 6): Where They Were Visible

Kp reached 6. At that level the edge of the auroral oval reaches about 54.5° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 50.0°. Activity stayed at storm level (Kp 5 or more) for 36 hours.

03579 G1 G3 Sun 19 Oct 18:00 UTC · Kp 5.33 Sun 19 Oct 21:00 UTC · Kp 5.33 Mon 20 Oct 00:00 UTC · Kp 3.67 Mon 20 Oct 03:00 UTC · Kp 3.00 Mon 20 Oct 06:00 UTC · Kp 5.00 Mon 20 Oct 09:00 UTC · Kp 4.33 Mon 20 Oct 12:00 UTC · Kp 4.00 Mon 20 Oct 15:00 UTC · Kp 4.33 Mon 20 Oct 18:00 UTC · Kp 5.00 Mon 20 Oct 21:00 UTC · Kp 5.67 Tue 21 Oct 00:00 UTC · Kp 4.67 Tue 21 Oct 03:00 UTC · Kp 4.00 Tue 21 Oct 06:00 UTC · Kp 4.67 Tue 21 Oct 09:00 UTC · Kp 4.67 Tue 21 Oct 12:00 UTC · Kp 5.33 Tue 21 Oct 15:00 UTC · Kp 5.33 Tue 21 Oct 18:00 UTC · Kp 5.33 Tue 21 Oct 21:00 UTC · Kp 6.00 Wed 22 Oct 00:00 UTC · Kp 4.67 Wed 22 Oct 03:00 UTC · Kp 5.33 Wed 22 Oct 06:00 UTC · Kp 5.00 Wed 22 Oct 09:00 UTC · Kp 3.33 Wed 22 Oct 12:00 UTC · Kp 4.33 Wed 22 Oct 15:00 UTC · Kp 5.00 Wed 22 Oct 18:00 UTC · Kp 3.67 Wed 22 Oct 21:00 UTC · Kp 1.67 Thu 23 Oct 00:00 UTC · Kp 2.67 Thu 23 Oct 03:00 UTC · Kp 1.33 Thu 23 Oct 06:00 UTC · Kp 2.33 Mon 20 OctTue 21 OctWed 22 OctThu 23 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

5,478 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 1,535 Seattle, Detroit, Milwaukee, Minneapolis Boothbay
Canada 951 Toronto, Montreal, Calgary, Ottawa Yarmouth
United Kingdom 770 Glasgow, Manchester, Leeds, Edinburgh Manchester
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 185 Kiel, Lübeck, Rostock, Flensburg Norderstedt
Poland 153 Gdańsk, Gdynia, Olsztyn, Elbląg Chojnice
Ireland 102 Dublin, Galway, Tallaght, Drogheda Dublin
Latvia 76 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Lithuania 73 Vilnius, Kaunas, Klaipeda City Municipality, Šiauliai Druskininkai
Estonia 65 Tallinn, Tartu, Narva, Pärnu Võru
Iceland 37 Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær Vík í Mýrdal
Australia 20 Hobart, Launceston, Devonport, Burnie Smithton
New Zealand 18 Dunedin, Invercargill, Mosgiel, Wānaka Waimate
Greenland 14 Nuuk, Sisimiut, Ilulissat, Qaqortoq Nanortalik
Faroe Islands 11 Tórshavn, Klaksvík, Hoyvík, Argir Argir
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

4,285 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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