It uncovered how supergranulations respond to solar cycles, aiding cycle prediction.
- Supergranulations are giant convection cells (or patterns) that form a vast network structure on the surface of the Sun.
About Solar Cycle
- The solar cycle is a periodic rhythm of magnetic activity that Sun undergoes every ~11 years.
- Mechanism: The Sun is composed of electrically charged gas (plasma) that generates a massive magnetic field.
- Every 11 years, this field undergoes a flip (north-south poles switch)
- This periodic cycle undergoes distinct phases:
- Solar Minimum: Cycle begins at solar minimum (low activity and few sunspots)
- Sunspots: Dark, cooler regions on the Sun caused by strong magnetic activity.
- Despite being cooler, more sunspots correlate with the Sun emitting more total energy.
- Solar Minimum: Cycle begins at solar minimum (low activity and few sunspots)
- Solar Maximum: As activity builds toward solar maximum, Sun becomes "stormy," featuring the highest number of sunspots and frequent eruptions.
- Impact on Space Weather: During the more active phases, the Sun also experiences an increase in giant eruptions, such as solar flares and coronal mass ejections (CMEs).
- Solar Flares: Sudden bursts of X-rays and radiation (travelling at speed of light) caused by release of magnetic energy in sunspot regions.
- CMEs: Massive bubbles of plasma and magnetic fields flung into space
- Impact: They can disrupt power grids, navigation systems, radio communications, and satellite operations, affect astronauts, induce geomagnetic storms affecting magnetic fields and events like Auroras etc.
About Kodaikanal Solar Observatory
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