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Spaceweather.

QUIET WITH A CHANCE OF UNREST: Following yesterday's complete miss by two CMEs, Earth's magnetic field is calm and quiet. The next episode of unrest is due on Sept. 5th when a stream of solar wind is expected to reach our planet. The gaseous material is flowing from an equatorial hole in the sun's atmosphere.

THE DANGER OF SUNSPOTS THAT DON'T FACE EARTH: Big sunspot AR2860 is about to disappear over the sun's Western limb. This makes it uniquely dangerous.

Sunspots located near the sun's Western limb are magnetically connected to Earth. The sun's magnetic field spirals around like a lawn sprinker--a shape known as the "Parker spiral."
If there is an eruption today while AR2860 is passing through this danger zone, the debris will be funneled back to Earth. The resulting radiation storm could pepper satellites with high-energy protons, fogging cameras and causing reboots of onboard electronics. At such times, short-wave radio propagation can become difficult to impossible. During extreme storms, passengers and crew in commercial aircraft may be exposed to radiation.