Fig. 4
From: Equatorial plasma bubble seeding by MSTIDs in the ionosphere
Keogram of a dTEC map: latitudinal cuts of 0–15° S (upper) and 15–30° S (lower) at 50° W as a function of time from 17:00 UT (14:00 LT) to 24:00 UT (21:00 LT) in the afternoon to evening period on July 05, 2014. The red-lined box indicates where the MSTIDs are propagating from S to N. The black broken lines indicate the solar terminator at an latitude of 300 km