A fast, far-sided halo CME was observed beginning at 04:36 UTC on 23 July in coronagraph imagery. The event originated from old Region 2665 (S06, L=111) which was responsible for two M-class flares during its rotation across the visible disk. The imagery above shows the event as seen from the NASA STEREO A spacecraft (left and right images) and the coronagraph on the NASA SOHO spacecraft (center). This CME is on the opposite side of the Sun and will not be geoeffective.
W8JK by ZR6TXA The W8JK is a famous and effective DX antenna The W8JK Introduction The W8JK is a famous and effective DX antenna, first built by John Kraus, W8JK, in 1937. After seeing a paper by George H Brown with theoretical calcu... Read more