Nasa has issued a solar flare alert and warned communications systems around the world could be knocked out.

The National Oceanic and Atmospheric Administration (NOAA) was forced to issue alert yesterday after it was estimated the solar flare reached 20,000C.

NOAA claimed the solar activity could cause possible disruptions to radio systems, including aviation communication.

Disruption could come just days after a global IT outage caused by a Crowdstrike outage caused havoc at airports worldwide.

The solar flare could result in weak power grid fluctuations and Aurora might be visible at high latitudes.

Canada and Alaska have been identified as places most likely to see Aurora.

A Nasa telescope last year captured a solar flare which disrupted radio communication.

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Solar flares are massive explosions of electromagnetic radiation.

They come from the Sun and can last anywhere from minutes to hours.

The electromagnetic energy travels at the speed of light.

Any effect on the sunlit side of Earth's exposed outer atmosphere happens simultaneously with the event being observed.

The increased level of X-ray and extreme ultraviolet radiation consequently creates ionisation in the lower layers of the ionosphere on the sunlit side of Earth.

Active regions experience the most solar flares and they are usually associated with sunspot groups.

The evolution of magnetic fields can create a point of instability and release energy in various forms as magnetic fields evolve.