Since early May, scientists have been monitoring the sunspot AR 3664. By May 7, it was 16-times as wide as the earth and brimming with magnetic energySince early May, scientists have been monitoring the sunspot AR 3664. By May 7, it was 16-times as wide as the earth and brimming with magnetic energy Since early May, scientists have been monitoring the sunspot AR 3664. By May 7, it was 16-times as wide as the earth and brimming with magnetic energy Science Science News | Latest Updates on Scientific Discoveries | The Hindu