The new solar storm is caused by coronal mass ejections (CMEs), which are explosions of particles leaving the Sun. When these particles arrive on Earth, they disrupt its magnetic field.

What causes an aurora? The root cause of an aurora is a solar storm, a dramatic blast of electromagnetic radiation from the Sun.

Auroras lit up skies across swaths of the planet for the second night in a row on Saturday, after already dazzling Earthlings from the United States to Tasmania to the Bahamas the day before

The most powerful solar storm in more than two decades struck Earth on Friday, triggering spectacular celestial light shows in skies from Tasmania to Britain -- and threatening possible disruptions to satellites and power grids as it persists into the weekend

New Zealand's South Island, and some parts of Australia, has been treated to the Aurora Australis, a natural light display in the sky.