A powerful solar flare flashed on an Earth-facing section of the sun.
The flare was complemented by the release of superhot plasma. A coronal mass ejection is expected to follow and reach earth later this week, which could cause disturbances of communication and power grids.
The flare was unleashed on Wednesday and is estimated at X1.6, placing it in the strongest “extreme class” of solar flares.

Fortunately, most of it is expected to pass north of Earth, causing a only week solar storm. Power grids will possibly experience fluctuations, as the plasma would affect the planetary magnetic field, but it poses little danger to those on earth or to anyone in the International Space Station.
On a positive note, the space weather events are likely to trigger colourful aurora borealis!
Image Credit: NASA
"Extreme solar storm approaches Earth." RT. N.p., n.d. Web. 11 Sept. 2014.
"Extreme solar storm approaches Earth." RT. N.p., n.d. Web. 11 Sept. 2014.