G1Peak 15 October 2017 at 03:00 UTC

Northern Lights on 15 October 2017 (Kp 5.3): Where They Were Visible

Kp reached 5.3. At that level the edge of the auroral oval reaches about 55.8° magnetic latitude, so the aurora could be seen low on the horizon down to roughly 51.3°. Activity stayed at storm level (Kp 5 or more) for 3 hours.

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

1,414 towns on our list had enough activity while it was dark there. Cloud cover is not included.

Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.
Country	Places	Examples	Furthest from the pole
United States	578	Seattle, Detroit, Milwaukee, Minneapolis	Cedar Rapids
Canada	388	Toronto, Montreal, Calgary, Ottawa	LaSalle
United Kingdom	169	Glasgow, Edinburgh, Belfast, Newcastle upon Tyne	Middlesbrough
Denmark	93	Copenhagen, Aarhus, Odense, Aalborg	Nakskov
Sweden	89	Gothenburg, Malmö, Linköping, Örebro	Trelleborg
Norway	65	Oslo, Bergen, Trondheim, Stavanger	Mandal
Iceland	18	Reykjavík, Kópavogur, Hafnarfjörður, Reykjanesbær	Vík í Mýrdal
Greenland	6	Nuuk, Sisimiut, Ilulissat, Qaqortoq	Qaqortoq
Faroe Islands	4	Tórshavn, Klaksvík, Fuglafjørður, Miðvágur	Tórshavn
Ireland	2	Letterkenny, Sligo	Sligo
Germany	1	Westerland	Westerland
Svalbard & Jan Mayen	1	Longyearbyen	Longyearbyen

Only in photos

2,247 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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