According to scientists, a sunspot four times the size of the Earth has appeared on the Sun. Experts say it can be seen without a telescope, but one needs to use eclipse glasses to block UV and infrared rays.
Researchers are closely monitoring this sunspot named AR3310. Sunspots are areas with an extremely strong magnetic field, and AR3310 has already triggered a powerful M-class flare.
NOAA warns there is a 20 percent chance that this sunspot could trigger an X-class flare, which could cause radio blackouts and power grid failures.