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G1Peak 15 October 1999 at 00:00 UTC

Northern Lights on 15 October 1999 (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 6 hours.

03579 G1 G3 Thu 14 Oct 00:00 UTC · Kp 3.33 Thu 14 Oct 03:00 UTC · Kp 4.33 Thu 14 Oct 06:00 UTC · Kp 3.67 Thu 14 Oct 09:00 UTC · Kp 3.67 Thu 14 Oct 12:00 UTC · Kp 4.67 Thu 14 Oct 15:00 UTC · Kp 5.00 Thu 14 Oct 18:00 UTC · Kp 4.33 Thu 14 Oct 21:00 UTC · Kp 4.33 Fri 15 Oct 00:00 UTC · Kp 5.00 Fri 15 Oct 03:00 UTC · Kp 5.00 Fri 15 Oct 06:00 UTC · Kp 4.33 Fri 15 Oct 09:00 UTC · Kp 4.00 Fri 15 Oct 12:00 UTC · Kp 3.67 Fri 15 Oct 15:00 UTC · Kp 4.67 Fri 15 Oct 18:00 UTC · Kp 3.33 Fri 15 Oct 21:00 UTC · Kp 2.67 Sat 16 Oct 00:00 UTC · Kp 4.00 Sat 16 Oct 03:00 UTC · Kp 4.67 Thu 14 OctFri 15 OctSat 16 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

1,358 towns on our list had enough activity while it was dark there. Cloud cover is not included.

CountryPlacesExamplesFurthest from the pole
United States 368 Seattle, Milwaukee, Minneapolis, Saint Paul Yakima
Canada 359 Toronto, Montreal, Calgary, Ottawa Hamilton
Sweden 145 Stockholm, Gothenburg, Malmö, Uppsala Oxie
Finland 123 Helsinki, Espoon keskus, Tampere urban area, Vantaa Raseborg
United Kingdom 103 Glasgow, Edinburgh, Aberdeen, Dundee Ashington
Norway 77 Oslo, Bergen, Trondheim, Stavanger Mandal
Denmark 75 Copenhagen, Aarhus, Aalborg, Frederiksberg Esbjerg
Latvia 39 Riga, Daugavpils, Liepāja, Jelgava Daugavpils
Estonia 21 Tallinn, Tartu, Narva, Pärnu Võru
Iceland 18 Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær Vík í Mýrdal
Lithuania 18 Klaipeda City Municipality, Šiauliai, Panevėžys, Mažeikiai Utena
Greenland 6 Nuuk, Sisimiut, Ilulissat, Qaqortoq Qaqortoq
Faroe Islands 4 Tórshavn, Klaksvík, Fuglafjørður, Miðvágur Tórshavn
Ireland 1 Letterkenny 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

1,747 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.

← 14 October 1999 · 21 October 1999 →