Prophecy Sign: Sign in the sun, moon and stars
During the coming Tribulation period, the Sun will undergo changes that will adversely affect the people living on the Earth at that time. It would appear that those changes will be far more than any major solar storm could inflict upon this planet.
The fourth angel sounded his trumpet, and a third of the sun was struck, a third of the moon, and a third of the stars, so that a third of them turned dark. A third of the day was without light, and also a third of the night. Revelation 8:12 NIV
The fourth angel poured out his bowl on the sun, and the sun was allowed to scorch people with fire. Revelation 16:8 NIV
Solar storm researchers prepare for the 'big one' with new urgency
The specter of a geomagnetic solar storm with the ferocity to disrupt communications satellites, knock out GPS systems, shut down air travel and quench lights, computers and telephones in millions of homes for days, months or even years has yet to grip the public as a panic-inducing possibility. But it is a scenario that space scientists, global insurance corporations and government agencies from the Department of Homeland Security (DHS) to NASA to the White House Office of Science and Technology Policy (OSTP) take seriously, calling it a "low probability but high-impact event" that merits a substantial push on several fronts: research, forecasting and mitigation strategy.