The Solar Ultraviolet Imager (SUVI) on board GOES-16 captured images of the giant coronal hole, wrapping most of the way around the sun on March 27, 2017.
National Oceanic and Atmospheric Administration’s (NOAA) Space Weather Prediction Center spotted a geomagnetic storm on March 30, 2017. It is called the coronal hole.
These dark spots are gaps in the sun’s magnetic field. The corona forms in the result of the outer layer of the sun. And from these spots, solar particles traveling over 1,5 million mph called the solar wind. As a result, it escapes into space. The most recent burst was traveling at 1,56 million mph.
The coronal hole in SUVI images was the source of the solar wind associated with yesterday’s storm. It effects areas, mostly regions with very low density. In ultraviolet images of the corona, the sports appear black because of the solar atmosphere. The surrounding of the corona is cooler from the entire mass which is where scientists get the name “coronal holes.”
NOAA reported that even though such geometric storms are not threat to the Earth, it can, sometimes, influence on “electrical grids at high attitude, pose moderate risks to satellites, and trigger intense auroral displays visible as far south as northern New York and Idaho.”