Ludendorff coronal flattening index of the total solar eclipse on March 9, 2016

Abstract

Ludendorff coronal flattening index of the Total Solar Eclipse (TSE) on March 9, 2016, was calculated at various distances in solar radius. As a result, we obtained the coronal flattening index ( = a + b) at a distance of 2 solar radii is 0.16. The 24 th solar cycle phase based on the 2016 TSE event obtained -0.64 which showed the corona is pre-minimum type. Resulted coronal flattening index value gives a predicted maximum amplitude of the monthly sunspot number (Wmax) for the 25 th solar cycle to be 70 ± 65. Therefore, the solar activity for 25 th solar cycle predicted to be lower than the current solar cycle, which has a maximum sunspot number value of 146 in

Coronal Flattening Index of Total Solar Eclipse on 20 April 2023 and the Prediction of Solar Cycle 25 Maximum

“…(Stoeva et al, 2008;Stoeva, Stoev, and Kuzin, 2011). Details of this region are not fully observable through satellitebased observations (Dani, Priyatikanto, and Rachman, 2016). This observational constraint presents an opportunity for investigating the above-mentioned parameters from the observations of the lower part of the solar corona during TSE.…”