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G1Peak 20 July 1991 at 06:00 UTC

Northern Lights on 20 July 1991 (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 Fri 19 Jul 06:00 UTC · Kp 4.00 Fri 19 Jul 09:00 UTC · Kp 4.00 Fri 19 Jul 12:00 UTC · Kp 5.00 Fri 19 Jul 15:00 UTC · Kp 4.67 Fri 19 Jul 18:00 UTC · Kp 6.33 Fri 19 Jul 21:00 UTC · Kp 4.33 Sat 20 Jul 00:00 UTC · Kp 3.00 Sat 20 Jul 03:00 UTC · Kp 3.67 Sat 20 Jul 06:00 UTC · Kp 5.00 Sat 20 Jul 09:00 UTC · Kp 4.33 Sat 20 Jul 12:00 UTC · Kp 3.67 Sat 20 Jul 15:00 UTC · Kp 4.33 Sat 20 Jul 18:00 UTC · Kp 4.00 Sat 20 Jul 21:00 UTC · Kp 4.00 Sun 21 Jul 00:00 UTC · Kp 4.33 Sun 21 Jul 03:00 UTC · Kp 5.67 Sun 21 Jul 06:00 UTC · Kp 4.00 Sat 20 JulSun 21 Jul
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

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

CountryPlacesExamplesFurthest from the pole
United States 359 Seattle, Milwaukee, Minneapolis, Saint Paul Yakima
Canada 351 Toronto, Montreal, Calgary, Ottawa Hamilton
New Zealand 7 Dunedin, Invercargill, Mosgiel, Gore Oamaru
Australia 3 Hobart, Bruny Island (Alonnah), Southport / Cockle Creek Hobart
Based on each place's Kp threshold (terrain included) and the Sun's position during each 3-hour Kp block.

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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