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Nasa spotted the sunspot last week, but it has lingered through to today
Dubbed AR2665, it is big enough to be spotted from Earth
Experts have warned the spot is large enough to produce ‘M-class’ solar flares
These can cause stunning auroras, and wipe out communication satellites
By Shivali Best
A huge spot has appeared on the sun that could send dangerous solar flares down to Earth.
The sunspot, dubbed AR2665, is 74,560 miles (120,000 kilometres) wide – big enough to be seen from Earth.
Experts have warned that the spot is large enough to produce ‘M-class’ solar flares, which can cause radio blackouts on Earth, knock out communications satellites and create radiation storms.
Nasa’s Solar Dynamics Observatory first detected the huge spot last week, and it appears to have lingered through to this week.
Sunspots are darker, cooler areas on the surface of the sun, caused by interactions with the sun’s magnetic field.
They tend to appear in regions of intense magnetic activity, and when that energy is released, solar flares and huge storms erupt from sunspots.
Such a storm could create stunning auroras around the world, as well as play havoc with power grids, potentially causing blackouts in some areas.
In a statement, Nasa said: ‘A new sunspot group has rotated into view and seems to be growing rather quickly.
‘It is the first sunspot to appear after the sun was spotless for two days, and it is the only sunspot group on the sun at this moment.
‘It could be the source for some solar flares, but it is too early to predict just what it will do.’
Forecasters from the NOAA say that there is a 25 per cent chance of M-class flares today, because the sunspot is directly facing our planet.
While the sunspot could be a threat to Earth, it also provides a chance for keen photographers to capture rare images of the sun.
Speaking to SpaceWeather.com, Mr Bruno Boni de Oliveira, an amateur photographer, said: ‘For months I’ve been observing airplanes flying through the sun on their way to Newark airport.’
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