We were camping on Lake Superior
What's making the northern lights brighter?
Earlier this week, the sun experienced a large solar storm that is sending a burst of radiation toward Earth. The radiation interacts with the planet's magnetic field, causing particles to collide and release energy in a burst of light.
Solar storm radiation output is measured by "Kp." A "3" rating means the aurora is relatively quiet, and generally only visible as far south as the Lake Superior basin or southern Canada.
Ian