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G1Peak 12 October 2017 at 00:00 UTC

Northern Lights on 12 October 2017 (Kp 5): Where They Were Visible

Kp reached 5. At that level the edge of the auroral oval reaches about 56.5° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 52.0°. Activity stayed at storm level (Kp 5 or more) for 3 hours.

03579 G1 G3 Wed 11 Oct 00:00 UTC · Kp 3.33 Wed 11 Oct 03:00 UTC · Kp 4.00 Wed 11 Oct 06:00 UTC · Kp 4.67 Wed 11 Oct 09:00 UTC · Kp 3.67 Wed 11 Oct 12:00 UTC · Kp 4.00 Wed 11 Oct 15:00 UTC · Kp 4.67 Wed 11 Oct 18:00 UTC · Kp 4.00 Wed 11 Oct 21:00 UTC · Kp 3.67 Thu 12 Oct 00:00 UTC · Kp 5.00 Thu 12 Oct 03:00 UTC · Kp 3.33 Thu 12 Oct 06:00 UTC · Kp 4.00 Thu 12 Oct 09:00 UTC · Kp 4.33 Thu 12 Oct 12:00 UTC · Kp 4.33 Thu 12 Oct 15:00 UTC · Kp 3.33 Thu 12 Oct 18:00 UTC · Kp 3.00 Thu 12 Oct 21:00 UTC · Kp 3.67 Fri 13 Oct 00:00 UTC · Kp 2.67 Wed 11 OctThu 12 OctFri 13 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

3,437 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 774 Milwaukee, Minneapolis, Saint Paul, Anchorage Racine
Canada 746 Toronto, Montreal, Calgary, Ottawa Hamilton
Sweden 469 Stockholm, Gothenburg, Malmö, Uppsala Oxie
Finland 454 Helsinki, Espoon keskus, Tampere urban area, Vantaa Hanko
United Kingdom 278 Glasgow, Edinburgh, Aberdeen, Dundee Ashington
Norway 276 Oslo, Bergen, Trondheim, Stavanger Mandal
Denmark 204 Copenhagen, Aarhus, Aalborg, Frederiksberg Esbjerg
Latvia 76 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Estonia 65 Tallinn, Tartu, Narva, Pärnu Võru
Iceland 37 Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær Vík í Mýrdal
Lithuania 29 Klaipeda City Municipality, Šiauliai, Panevėžys, Mažeikiai Utena
Greenland 14 Nuuk, Sisimiut, Ilulissat, Qaqortoq Nanortalik
Faroe Islands 11 Tórshavn, Klaksvík, Hoyvík, Argir Argir
Ireland 3 Letterkenny, Buncrana, Gweedore Letterkenny
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

4,370 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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