Sympathetic solar flare

News Excerpt: 

Four solar flares erupt simultaneously  in a rare celestial event, possibly heralding in the Sun’s dynamic 11-year cycle.

More about news: 

  • The sight of “sympathetic solar flares” in different regions of the star was captured by NASA’s Solar Dynamics Observatory, showing complex magnetic interactions.
  • The four-part eruption began, originating from three sunspots and a large magnetic filament
  • Each of the blast sites were separated by hundreds of thousands of miles and the area between them covered around a third of the solar surface facing Earth.
  • The concurrent blasts were part of one single eruption, known as a sympathetic solar flare.

What are sympathetic flares?

  • Sympathetic flares are caused by multiple eruptions across the Sun’s magnetic field, linked by massive magnetic field loops that lie above the solar surface. 
  • When one spot detonates, others follow suit. This leads to coronal mass ejections (CMEs) and massive bursts of plasma.
  • Such solar activity is likely an indication of the Sun reaching the peak of its 11-year solar cycle known as solar maximum
    • The peak is marked by increased solar events like flares and CMEs.
      • This is the third sympathetic solar flare this year, following a pair of explosions in January and a duo of X-class flares in March.

Why is this event rare?

  • Most sympathetic flares reported so far include two linked flares, ranging from small outbursts to X-class flares, the most powerful class of solar flares the sun can produce.
  • The emission of four flares in unison makes this event super-sympathetic.

How can they impact Earth?

  • If directed towards the Earth, they have the potential to,
    • Disrupt power grids
    • Telecommunication networks 
    • Orbiting satellites 
    • Expose astronauts to dangerous doses of radiation
    • Minor class G1 geomagnetic storms could also illuminate skies at lower latitudes with auroras.

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