Spacecraft (green trajectory) on their way from the Earth (blue orbit) to Mars (red orbit) risk being hit by energetic events from the Sun, such as X-rays, energetic protons (blue streaks), and material from Coronal Mass Ejections (CMEs) (red blobs). The spiral lines from the Sun represent the magnetic field lines 'frozen' into the solar wind.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 184.108.40.206.0