Open Access

Table 2.

NOAA number of the investigated active regions with the extension of the flow field from the sunspot boundary and selected velocity values.

AR Period (3 pixel) (m s−1) (m s−1) (m s−1) (Mm) (Mm) (Mm)
(1st day) (w/o penumbra) (w/o spot) (1st day) (w/o penumbra) (w/o spot)
11676 19.–27.02.2013 677 373 237 14.5 10.43 6.6
11641 02.–08.01.2013 838 488 342 14.8 12.9 13.1
11646 05.–10.01.2013 957 400 221 9.4 8.0 4.3
11841 13.–21.09.2013 711 519 9.8 8.4
12013 21.–26.03.2014 929 289 8.8 3.8
12163 09.–16.09.2014 968 443 130 9.9 10.3 4.1
12169 18.–26.09.2014 1051 318 266 15.2 6.8 6.5
12170 19.–26.09.2014 916 356 309 12.6 6.8 6.7

mean 881 398 251 11.9 8.4 6.9

Notes. (3 pixel) is the mean maximum horizontal velocity (average over the first day of analysis), which is found at the sunspot boundary. is the mean maximal velocity after the penumbra/the spot has fully dissolved for different locations in the flow field.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.