The events of 150618 shown above, are most likely due to solar activity received by the sidelobes of the Nancay Decametric Array. I thank Laurent Denis for his analysis.
150622 Sun - Eruptive M6.5 Flare with Earth directed CME
150622 1653 to 150623 1319 UT, animation of M6.5 flare and post flare activity affecting a huge solar region, ultraviolet composite at 171 211 and 304 nano meter
150625 Sun, animation of M7.9 flare in AR 2371, 171 nm ultraviolet