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 (ϵ = a + b) at a distance of 2 solar radii is 0.16. The 24th 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 25th solar cycle to be 70 ± 65. Therefore, the solar activity for 25th solar cycle predicted to be lower than the current solar cycle, which has a maximum sunspot number value of 146 in February 2014
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