NASA has warned that a huge solar flare now developing could cause
a dangerous solar storm that could disrupt electrical grids on Earth.
At present NASA is estimating a 15% chance that sunspot region
AR 1678 may generate an X-class solar flare as it rotates toward
Earth over the next 48 hours.

At present, the sunspot region is at least six times the size of Earth,
and is growing rapidly. It has developed what is known as a delta class
magnetic field, which is a type that can generate strong solar storms.
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