Aditya-L1 Detects Early Warning Signs of Solar Flares

 Aditya-L1 Detects Early Warning Signs of Solar Flares

Prelims:

Science & Technology

Mains:

 GS Paper III – Science & Technology

Current relevance:

A new study using simultaneous ultraviolet (UV) and X-ray observations from three payloads aboard Aditya-L1 has detected small, short-lived brightenings in the Sun’s atmosphere hours before major solar flares, providing potential clues for improving solar-flare forecasting and space-weather prediction.

Highlights:

Key Findings of the Study:

1.        Scientists observed numerous small, short-lived brightenings or “transient events” in active regions of the Sun before major solar flares.

2.      These transient events were concentrated around the location where the major flare subsequently occurred.

3.      Some transient brightenings also exhibited X-ray signatures, indicating the release of magnetic energy.

4.      The observations suggest that repeated small-scale energy releases may progressively destabilise the magnetic field in an active region, eventually resulting in a major solar flare.

Aditya-L1 Payload:

The study combined observations from three Aditya-L1 payloads:

1.       Solar Ultraviolet Imaging Telescope (SUIT):

                     i.            Observes the Sun through 11 near-ultraviolet (NUV) filters.

                   ii.            These observations reveal different atmospheric layers extending from the upper photosphere to the chromosphere.

                 iii.            NUV observations are particularly important from space because Earth's atmosphere absorbs most ultraviolet radiation, making these wavelengths largely inaccessible from the ground.

2.     Solar Low Energy X-ray Spectrometer (SoLEXS):

   i.            Measures X-ray emissions associated with energetic processes in the solar corona.

3.     High Energy L1 Orbiting X-ray Spectrometer (HEL1OS):

                     i.            Also measures X-ray emission associated with energetic processes in the solar corona.

Space-Based Infrastructure:

         i.            Improved understanding and forecasting of solar flares can help protect:

·         Satellites

·         Astronauts

·         Communication systems

·         Other critical technologies

 ii.            Thus, the findings demonstrate how multi-wavelength observations from Aditya-L1 can improve understanding of solar activity and contribute to better space-weather preparedness.

Significance for Solar-Flare Forecasting:

1.        Early-warning potential: Transient brightenings occurring hours before major flares could potentially serve as precursor signatures.

2.      Understanding flare mechanisms: The findings provide insights into the physical processes responsible for triggering solar flares.

3.      Magnetic-energy dynamics: They indicate that a major flare may emerge through the cumulative effect of repeated small-scale magnetic-energy releases.

4.      Improved forecasting: Identifying reliable precursor signals could move scientists closer to reliable solar-flare forecasting.

5.      Space-weather prediction: Better flare forecasting can improve the prediction of potentially disruptive space-weather events.

Source: THE HINDU - https://www.thehindu.com/sci-tech/science/new-study-captures-suns-early-warning-signs-before-solar-flares/article71407804.ece