Figure 4From: Analysis of propagation delays of compressional Pi 2 waves between geosynchronous altitude and low latitudesIsochron map showing wave fronts of fast-mode waves illustrated by the model of (Uozumi et al.2009). The wave source is set at r = 10 R E and LT = 22 to 24 h. Blue and red contours are time intervals of 2 and 10 s, respectively. The dashed circle indicates geosynchronous orbit. The green ellipse illustrates the plasmapause.Back to article page