A restless sunspot threw off a double solar flare Monday (April 25), triggering some radio blackouts over Asia and Australia.
, but it is hundreds of millions of square miles in area – Earth would sit in the active region as comfortably as an egg in a nest.where the magnetic field is temporarily much stronger than the surrounding areas. These magnetic forces block the flow of hot gas from the Sun's interior, making sunspots much cooler than their surroundings. Solar flares happen when the magnetic field lines near sunspots reorganize explosively.
Sometimes, these eruptions of radiation also trigger coronal mass ejections , which are explosions of the Sun's plasma.. Solar activity occurs in regular 11-year cycles, which have been recorded since 1775. The Sun is currently in Solar Cycle 25 and is in a period of ramping up its activity. Solar Cycle 25 is expected to peak in late 2024 or early 2025, meaning that the frequency of sunspots, solar flares and CMEs are expected to increase.
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