The ARRL Solar Update

Solar activity has been at low levels with only C-class flares produced by Regions 4401, 4405, and 4409. There were 9 numbered active regions on the solar disk, with 4409 showing the most significant growth during the period and producing the largest flares on April 1. A new region emerged but it has not yet been numbered.   Multiple filaments erupted during the day on April 1, producing coronal mass...