SOLAR FLARES AND ERUPTIONS Lyndsay Fletcher University of Glasgow.

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Presentation transcript:

SOLAR FLARES AND ERUPTIONS Lyndsay Fletcher University of Glasgow

Sunspots - hotbeds of solar activity

Solar minimum, solar maximum

An active region seen by Hinode

Winding up the magnetic field Gas at the solar equator has a higher speed than that at the poles. This ‘winds up’ the magnetic field - like stretching a rubber band

Magnetic Loops

Twisted loops images:TRACE/NASA

A Solar Flare An explosion in the Sun’s corona cause by magnetic energy build-up

Start of a coronal mass ejection A billion tonnes of ionised gas, moving at a million kilometers per hour

Coronal mass ejections seen by SOHO

During solar maximum, the Sun produces about 3 big mass ejections per day Coronal mass ejections seen by SOHO

How do flares and eruptions affect Earth? We live inside the atmosphere of a star!

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