Dependence of the detected number of QSEBs and their measured area and brightness on atmospheric seeing conditions. (a) Variation of rms contrast of WB images (red), Fried’s parameter r₀ (black), and detected number of QSEBs (blue) during the observed time series. The shaded gray area indicates seeing (r₀) variation within an Hβ line scan. (b) Scatter plot between rms contrast of WB images and the number of detected QSEBs. The colors of the data points show r₀ values. (c) Scatter and JPDFs between rms contrast of WB images and area of QSEBs. (d) Scatter and JPDFs between rms contrast of WB images and brightness of QSEBs. Darker color shades in JPDFs plots indicate high-density occurrence.