Northern lights, or aurora borealis, are dependent on solar activity and like everything else in nature follow a cycle. Northern lights are caused by solar flares from the sun barrelling towards and then striking earth’s atmosphere, highly energized electrons interacting with oxygen and nitrogen molecules, putting on the wonderful performance of colours and movement that we all love.
Solar activity follows an eleven year cycle and the maximum activity took place in 2013 and 2014. This year and next will still be great to spot the northern lights, but the solar activity will be at a minimum in 2020. This does not mean there won’t be any northern lights. It’s just a relative scale.
Here is a video of the northern lights in Iceland taken at Gullfoss and Skaftafell: