TEC depletion detected on 2nd February 2002 at 2:02 UT (~21:26 LT of previous day) from the areq GNSS receiver using the Equatorial Plasma Bubbles automatic detection tool described in Section 3. Depletion related with an EPB of 13.2 TECUs depth and a duration of 38 min. Light green dots: estimated TEC from LI (TECU). Blue dots: TEC from PI (TECU). Red dots: the 5-point running means smoothed TEC from PI (TECU) with an elevation mask of 20°. Dark green line: predicted background TEC from LI (TECU). Vertical lines whose values are shown in the legend mark the initial time (T ₀) and final time (T _f) of the bubble detection.