On Tuesday evening, the sun erupted, and the effects will reach the Earth between 1-5am on Thursday.
This will be the largest solar storm in five years.

The storm was started with a massive solar flare, and has been increasing its speed.
“It’s hitting us right in the nose,” said Joe Kunches, a scientist for the National Oceanic and Atmospheric Administration.
According to professionals, the storm will last from Thursday to Friday morning.

The charged particle will hit Earth at 6.4million kilometres per hour. ( That is freaking freaking freaking fast.)
NASA solar physicist Alex Young added, “It could give us a bit of a jolt.” But he said this is far from a super solar storm.

On the other hand.. the good news is that we might be able to see auroras (Northern Lights) on Thursday evening.

Auroras are “probably the treat we get when the sun erupts,” Kunches said.

In general, solar storms have 3 ways to disrupt technology on Earth; magnetic, radio, and radiation emissions. However, it is very unlikely that all three types of disruptions will be strong.

“The magnetic part of the storm has the potential to trip electrical power grids. Kunches said utility companies around the world have been alerted. The timing and speed of the storm determines whether it knocks off power grids, he said.”

Other than the potential to trip electrical power grids, it can also make GPS less accurate, and there might be a GPS outage.
In the meantime, some airlines had already rerouted flights.

[source:here]