GCR depressions. From top to bottom: time profile of HET normalised ion count rates, solar wind speed, density, and magnetic field magnitude for the period from 09:36 UT on 16 June to 09:35 UT on 24 June (black lines) and from 00:00 UT on 19 July to 00:00 UT on 27 July (green lines). The time difference between the two periods is 32.6 days. The black vertical line indicates the start of the second GCR depression at 22:00 UT on 18 June.