MINOR GEOMAGNETIC STORM WARNING: A large hourglass-shaped hole in the sun's atmosphere is facing Earth and spewing solar wind in our direction. Estimated time of arrival: August 5th-6th. Minor G1-class geomagnetic storms and high-latitude auroras are possible when the gaseous material arrives. Visit Spaceweather.com for updates.
Aurora alerts: Sign up for Spaceweather Alerts and get a text message when auroras appear in your area.
Above: This extreme ultraviolet image from NASA's Solar Dynamics Observatory shows a hole in the sun's atmosphere directly facing Earth. The chasm stretches more than 400,000 km from top to bottom.
