131842.fig.004a
(a)
131842.fig.004b
(b)
131842.fig.004c
(c)
131842.fig.004d
(d)
131842.fig.004e
(e)
131842.fig.004f
(f)
131842.fig.004g
(g)
131842.fig.004h
(h)
131842.fig.004i
(i)
Figure 4: (a)–(e): absolute (foF2 distribution) LT maps for -15-16 LT. From (a) to (e): combined map for 15 and 19 May (undisturbed conditions, background level) and 21, 22, 26, and 27 of May. (f)–(i): the maps of the critical frequency deviation (in % relative to the top panel in the left column). From (f) to (i): 21, 22, 26, and 27 May. The epicenter position is shown by an asterisk.