This map shows how far south the Northern Lights could appear at different KP index levels. While a KP of 3 or less would keep them in northern latitudes of Alaska and Canada, a KP of 9 would make them visible in places like Salt Lake City, St. via Technology and News Today https://weatherboy.com/strong-to-extreme-geomagnetic-storm-expected-along-with-vivid-northern-lights/