5/31/2023 0 Comments Sun corona ring![]() ![]() This time, they had used inputs and made the prediction 43 days ahead of the eclipse. These are more frequent during solar maxima and pose a threat to space reliant technology and astronauts,” says Soumyaranjan Dash, PhD student at IISER Kolkata who works on this model. “The dynamic events on the Sun can affect Earth’s outer atmosphere and our technologies, leading to disruption in communication and navigation networks (GPS). Space weather consists of the varying conditions such as solar wind and is different from weather on earth. ![]() This is great, because this gives advance knowledge and a large window of preparedness for space weather driven by coronal magnetic fields,” says Dr. “Our previous research indicates that we can predict the large-scale structure of the Sun’s corona up to two months in advance. Prantika Bhowmik, now at Durham University, UK, developed this model with Dr Nandi. The Predictive Solar Surface Flux Transport model developed by the CESSI team can predict the shape of the corona well in advance. We are still trying to figure out why this worked so well this time,” says Dibyendu Nandi, who is a professor and Principal Investigator at CESSI. “For the South American Eclipse of 2 July, our predicted streamer tilts were slightly larger than observed at large distances from the Sun. This was imaged by NASA and European Space Agency’s space-based Solar and Heliospheric Observatory (SOHO) using the LASCO instrument. While the earlier prediction differed slightly from the actual image, this time, it has been pretty close to the real thing. This is the second successful prediction, counting the last solar eclipse that was viewed from South America on July 2 this year. The corona is the outermost part of the Sun’s atmosphere. Solar physicists from Centre for Excellence in Space Sciences (CESSI), IISER Kolkata, have succeeded in predicting the shape of Sun’s corona at the time of the annular eclipse on December 25.
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