When Might the Northern Lights Be Visible Again? Use This Online Tool
Predicting the Aurora Borealis, the "Northern Lights", is more difficult than predicting the weather. Why? You need to have a major geomagnetic storm on the sun, with charged particles hitting Earth's magnetic field. We often don't know that more than a few hours in advance. Conditions may remain ripe for seeing the Northern Lights and a new online tool allows you to check your odds of a free show in the northern sky.