What's the furthest south in the U.S, or Canada that you can see the northern lights? Thanks

http://wikitravel.org/en/Northern_Lights

Click on Where (in the contents box) and read the last paragraph.

To determine the furthest south in the U.S. or Canada where you can see the northern lights, you need to consider the geomagnetic latitude, which is the measure of how far north or south you are from the Earth's magnetic equator. The term "northern lights" refers to the Aurora Borealis, a natural phenomenon that occurs near the Earth's poles. Similarly, the southern counterpart is called the Aurora Australis.

In general, the closer you are to the Earth's magnetic poles, the more likely you are to witness the northern or southern lights. The Earth's magnetic poles are not aligned exactly with the geographic North and South Poles, which means that you can see the northern or southern lights closer to the equator on occasion.

In the United States, the northern lights can occasionally be seen in northern states such as Alaska, northern portions of Montana, North Dakota, Minnesota, Wisconsin, and Michigan. However, the further south you go, the less likely it becomes to witness the phenomenon.

In Canada, the northern lights can be seen in several provinces, including the Yukon, Northwest Territories, Nunavut, and parts of British Columbia and Alberta. The Canadian provinces that are closest to the Arctic Circle offer the best chances of viewing the northern lights.

To improve your chances of seeing the northern lights, consider the following factors:

1. Geomagnetic activity: Check the forecast for geomagnetic storms or high activity. Websites like the Space Weather Prediction Center provide real-time updates on geomagnetic conditions.

2. Dark skies: Find a location away from city lights and light pollution to improve visibility.

3. Clear weather conditions: Clear skies increase the odds of seeing the auroras.

4. Time of year: The best time to see the northern lights is during the winter months when there are longer nights and darker skies.

Remember that the intensity and visibility of the northern lights can vary greatly, so even if you are in a suitable location, there is no guarantee that you will be able to see them. Patience and persistence are key when chasing this natural wonder.