Fig. 5From: Unseasonal development of post-sunset F-region irregularities over Southeast Asia on 28 July 2014: 2. Forcing from below?The F-layer base (virtual) height (h′F) variations over a Bac Lieu and b Tirunelveli on 28 July 2014 (red line) along with the corresponding monthly mean (blue lines with error bars). Cyan line indicates the duration of Equatorial Spread F (ESF)Back to article page