A HOLE IN THE SUN'S ATMOSPHERE: Spewing a stream of solar wind as fast as 700 km/s (1.6 million mph), a hole in the sun's atmosphere is turning toward Earth. Forecasters expect the stream to reach our planet on June 15th or 16th with a 40% chance of minor G1-class geomagnetic storms when it arrives. High-latitude sky watchers should be alert for auroras in the nights ahead, especially in the southern hemisphere where deepening autumn darkness favors visibility. Visit Spaceweather.com for more information and updates.
Above: A coronal hole (CH) in the sun's atmosphere is turning to face Earth. Coronal holes are places where the sun's magnetic field peels back and allows solar wind to escape. June 13th image credit: Solar Dynamics Observatory/LMSAL
