Figure 5From: Observation of ionospheric disturbances induced by the 2011 Tohoku tsunami using far-field GPS data in HawaiiThe vTEC variation series and time-frequency diagrams. The results are derived from satellite PRN 21 (panel (a)) and satellite PRN 22 (panel (b)) using the observations in station AHUP. Panels (c) and (d) are corresponding time-frequency diagrams.Back to article page