Figure 1: Solar observations of the X1.2 flare and associated phenomena on 7 January 2014 18–20 UT.
From: Strong coronal channelling and interplanetary evolution of a solar storm up to Earth and Mars
(a) Location of coronal holes and post eruption arcade in SDO/AIA 193 Å. (b) Extreme ultraviolet (EUV) wave evolution between 18:04 and 18:19 UT derived with the Coronal Pulse Identification and Tracking Algorithm (CorPITA) algorithm. Colours indicate the position of the wave front at different times. (c) Final extent of the coronal dimming (SDO/AIA 211 Å). (d) SDO/HMI line-of-sight magnetic field, showing the position of the large active region and the flare. White (black) colours indicate positive (negative) magnetic field polarities. (e,f) Pre-eruption potential field source surface model of the solar global magnetic field, as seen from Earth (e) and 40° west of Earth (f). It depicts closed (white) and open field lines (pink negative polarity, green positive polarity). Solar east (west) is to the left (right) in all images.
