Figure 1From: Analysis of propagation delays of compressional Pi 2 waves between geosynchronous altitude and low latitudesPlots of geomagnetic data around 13:20 UT on August 14, 2010. (a) Filtered P-component data from ETS-VIII (ETS P) and H-component data from low-latitude ground stations around 13:20 UT on August 14, 2010 (filter range of 40 to 150 s). (b) Filtered H-component data from KUJ without a time shift and P-component data from ETS-VIII with a positive time shift of 42 s.Back to article page