Low-Latitude Atmosphere-Ionosphere Effects Initiated by Strong Earthquakes Preparation Process

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.

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