Sunspot 1520 about 5h before an 1.4 X-flareJuly 13, 2012|Sun, Sun H-alpha Home » Sample Page » Sun » Sunspot 1520 about 5h before an 1.4 X-flare Image of AR1520 about 5 hours before the major X-flare (1.4) on 12th July 2012 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Name* Email* Website Save my name, email, and website in this browser for the next time I comment. Time limit is exhausted. Please reload the CAPTCHA. eight × = 24 By using this form you agree with the storage and handling of your data by this website. * This site uses Akismet to reduce spam. Learn how your comment data is processed.