The CME was launched during a powerful X-class solar flare on Jan. 18 and raced toward Earth at speeds of 620–870 miles per second (1,000–1,400 km/s). Aurora chasers, get those camera batteries charged and your alerts switched on — tonight could be quite the night.

Earth is still reverberating from the colossal coronal mass ejection ( CME) that struck on Jan. 19, triggering dazzling aurora displays worldwide. And while tonight's show (Jan. 20) may be somewhat more subdued, the solar storm isn't quite over — so keep your camera batteries charged and your aurora alerts on.

Amid severe geomagnetic storm conditions, the northern lights could be visible from even more states on Jan. 19. Here's everything you need to know about this stellar event.

Those who missed the surprise Northern Lights display in November got another chance on January 19. And after that show, the National Oceanic and Atmospheric Administration is predicting the Aurora Borealis might still be visible on Tuesday, January 20, in the northernmost U.S.

A rare and fast CME triggered a severe G4 geomagnetic storm, producing brilliant auroras seen across Europe and the U.S. under ideal dark sky conditions.

A strong northern lights display could be blocked by clouds and snow in Michigan Tuesday night, Jan. 20. Where you might see it.

The Northern Lights are mostly visible near the Arctic Circle but at times of high solar activity can be seen in other areas. Photos sent in to the BBC show dazzling displays of colourful light in places including Penmachno in Conwy, Llandegla in Denbighshire, and Narberth in Pembrokeshire.