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Context
Sun’s corona
Why is the corona so dim?
Why is the corona so hot?
How does the corona cause solar winds?
What is a sunspot? It’s an area of intense magnetic activity on the surface of the Sun—a storm—that appears as an area of darkness. Sunspots are indicative of solar activity, giving birth to solar flares and coronal mass ejections (CMEs). Sunspots have been continuously counted each day since 1838. This has allowed solar scientists to describe a repeating pattern in the wax and wane of activity on the Sun’s surface—the solar cycle. |
The coronal mass ejections (CMEs)
Impact of Solar Flares and CMEs on Earth
Not all solar flares reach Earth, but solar flares/storms, solar energetic particles (SEPs), high-speed solar winds, and coronal mass ejections (CMEs) that come close can impact space weather in near-Earth space and the upper atmosphere.
Do you know? A solar storm in March 1989 caused a nine-hour blackout Hydro-Québec's electricity transmission system in Canada. |
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