SolarHam.com | PHOTO - Triangle shaped Coronal Hole currently facing Earth

Here is a new image courtesy of SDO showing a  . A Coronal Hole represents a region in the corona that is cooler than it's surroundings and open magnetic field lines are present here. The solar wind flows from Coronal Holes at a higher speed and eventually gust past our planet if in a favorable position. The solar wind is expected to increase by September 21 and may lead to minor geomagnetic activity at very high latitudes.

Solar Dynamics Observatory SDO | 48 hr video VISIBLE SUNSPOTS and CORONAL HOLE

A solar wind stream flowing from the indicated coronal hole could reach Earth on Sept. 5-7. Credit: SDO/AIA.

SDO - Solar Dynamics Observatory

http://sdo.gsfc.nasa.gov/data/

SpaceWeather.com | From NASA Coronal Hole spewing Solar Wind

CORONAL HOLE: A yawning dark hole in the sun's atmosphere is spewing solar wind toward Earth. NASA's Solar Dynamics Observatory photographed the opening during the early hours of Friday August 26th:

Solar wind flowing from this coronal hole is expected to arrive on Aug. 28-29.

SDO | Solar Dynamics Observatory

sdo.gsfc.nasa.gov

Spaceweather.com | Solar wind stream flowing from far-northern coronal hole will probably miss Earth 09Jun09

Credit: SOHO Extreme UV Telescope