Fig. 31
From: Earth-affecting solar transients: a review of progresses in solar cycle 24
Left: SDO/AIA composite image of the wavelength channels 211-193-171A from June 30, 2012, showing the reduced density region of a coronal hole (shaded area). At the time t0, the central position of the coronal hole is extracted from remote data. At about t0 + 1 day, the maximum in the density/magnetic field and at about t0 + 4d the maximum in the speed/temperature is observed from in situ data at 1 AU. Right: Cartoon by Pizzo (1978) to illustrate the fundamental processes involved in the 3D dynamics of stream evolution