WASHINGTON, United States (AFP) — Spectacular displays of auroras at abnormally low latitudes were expected again Wednesday night into Thursday, a result of intense solar activity which also carries risks to communication networks.

After kicking off earlier this week, the rare event could continue until Thursday, according to the US National Oceanic and Atmospheric Administration (NOAA).

The phenomenon, which could be seen Wednesday night in the skies of New Zealand and Australia, is caused by massive ejections of solar particles from the Sun — known as coronal mass ejections (CMEs) — that trigger geomagnetic storms when they reach our planet.

NOAA said a level 4 storm out of 5 occurred Tuesday, and that another CME’s arrival could mean a repeat again on Thursday.

Skies as far south as Mexico lit up Tuesday night with faint pink and green glows, delighting many people who would normally have to travel much closer to the Earth’s poles to see such phenomena.

Last year, a level 5 geomagnetic storm occurred for the first time in 20 years, resulting in similarly spectacular views of the Northern and Southern Lights.