Supporting solar information for INTEGRAL/SREM SEP event I10, detected on 2005 January 15. (a) PFSS-extrapolated SOHO/MDI magnetogram obtained at UT 00:04 on 2005 January 16. Shown in the north-western quadrant is the intense, eruptive NOAA active region (AR) 10720. Magnetic field lines that close back to the Sun are white, while green lines indicate “open” (heliosphere-closing) magnetic connections. (b) Nearly simultaneous SXR image by GOES/SXI showing that NOAA AR 10720 is very bright, indicating flaring activity. The inset shows a nearly simultaneous hard X-ray closeup of the AR reconstructed by RHESSI that also shows flaring emission in the AR. (c) Nearly simultaneous image in the EUV obtained by SOHO/EIT where, again, NOAA AR 10720 is very bright. (d) Full-disk radio image at 17 GHz from the Nobeyama Radioheliograph showing that the AR is also emitting in radio wavelengths. (e) A SOHO/LASCO C2 image providing evidence that the flare triggered in the AR is eruptive, giving rise to a very fast CME. (f) The same image processed by SEEDS and demonstrating the leading edge of the CME (red crosses) and the preceding CME-driven shock (blue crosses).