Monitoring solar activity on the far side of the Sun from sky reflected Lyman radiation


Solar active regions are known to be brighter in Lyman (• radiation than the quiet sun. Accordingly, they illuminate more H atoms in interplanetary space through resonance scattering. As we show here, this excess of illumination related to active regions is clearly seen in full-sky Lyman a maps recorded by the SWAN instrument on board SOHO, including those… (More)


4 Figures and Tables