The northern lights increase in intensity due to "holes" in the sun - creating great anticipation in the travel industry - news Troms and Finnmark - Teknomers English News
Northern Lights Forecast - How to predict the Aurora Borealis
Northern Lights | When and where to see the Aurora Borealis
Northern Lights – Travel guide at Wikivoyage
Northern Lights Forecast - How to predict the Aurora Borealis