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G2Peak 20 April 2018 at 06:00 UTC

Northern Lights on 20 April 2018 (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 12 hours.

03579 G1 G3 Thu 19 Apr 06:00 UTC · Kp 0.00 Thu 19 Apr 09:00 UTC · Kp 1.00 Thu 19 Apr 12:00 UTC · Kp 0.33 Thu 19 Apr 15:00 UTC · Kp 0.00 Thu 19 Apr 18:00 UTC · Kp 0.67 Thu 19 Apr 21:00 UTC · Kp 0.67 Fri 20 Apr 00:00 UTC · Kp 3.33 Fri 20 Apr 03:00 UTC · Kp 4.00 Fri 20 Apr 06:00 UTC · Kp 6.00 Fri 20 Apr 09:00 UTC · Kp 5.67 Fri 20 Apr 12:00 UTC · Kp 4.33 Fri 20 Apr 15:00 UTC · Kp 5.00 Fri 20 Apr 18:00 UTC · Kp 5.33 Fri 20 Apr 21:00 UTC · Kp 3.33 Sat 21 Apr 00:00 UTC · Kp 3.00 Sat 21 Apr 03:00 UTC · Kp 2.67 Sat 21 Apr 06:00 UTC · Kp 2.67 Sat 21 Apr 09:00 UTC · Kp 2.00 Sat 21 Apr 12:00 UTC · Kp 2.33 Sat 21 Apr 15:00 UTC · Kp 3.33 Sat 21 Apr 18:00 UTC · Kp 3.00 Fri 20 AprSat 21 Apr
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

1,869 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 1,020 Chicago, Seattle, Portland, Detroit Peoria
Canada 406 Toronto, Montreal, Calgary, Ottawa Eastern Passage
Finland 122 Helsinki, Espoon keskus, Tampere urban area, Vantaa Raseborg
Sweden 109 Stockholm, Malmö, Uppsala, Örebro Trelleborg
Norway 66 Oslo, Bergen, Trondheim, Stavanger Grimstad
Latvia 39 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Denmark 28 Copenhagen, Frederiksberg, Hvidovre, Avedøre Vordingborg
Lithuania 25 Kaunas, Klaipeda City Municipality, Šiauliai, Panevėžys Kaunas
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
New Zealand 16 Christchurch, Dunedin, Invercargill, Rolleston Christchurch
Australia 7 Hobart, Launceston, Devonport, Burnie Burnie
Faroe Islands 4 Tórshavn, Klaksvík, Fuglafjørður, Miðvágur Tórshavn
United Kingdom 4 Isle of Lewis, Thurso, Kirkwall, Lerwick Isle of Lewis
Iceland 1 Höfn Höfn
Kazakhstan 1 Petropavl Petropavl
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

Only in photos

2,175 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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