Coronal Holes: Definition, Causes, How Holes on Sun Affect Earth

Two huge coronal holes have appeared on the sun this month, spewing 1.8 million mph solar winds towards the Earth. Here's what they are, how they form and their impact on our planet.

Coronal Holes: The (Rarely Round) Gaps In The Sun's Atmosphere : NPR

Coronal Holes: Definition, Causes, How Holes on Sun Affect Earth

Explained: What Is A Solar Flare?

Coronal Holes: The (Rarely Round) Gaps In The Sun's Atmosphere : NPR

Coronal hole - Wikipedia

Coronal hole on Sun could hit Earth?

Ask Ethan: How vulnerable is Earth to a solar flare? - Big Think

A hole in the sun: Should you be worried?

Coronal mass ejection (CME), Definition & Effects

A 'hole' 30 times Earth's size has spread across the sun, blasting solar winds that'll hit our planet by end of this week - Yahoo Sports

Diagrams showing how the coronal hole indices are calculated from an

Sun

What is a coronal hole?, Help

Coronal Hole - an overview