Figure 10
From: Study on co-seismic ionospheric disturbance of Alaska earthquake on July 29, 2021 based on GPS TEC
Distribution map of the abnormal propagation velocity of satellites G04, G06, G09 and G16. The red circle represents the position where the maximum abnormal value of a particular satellite appears at 06:00–07:00 UT, the blue dashed line represents the time of the earthquake, and the slope of the black dashed line represents the propagation velocity. The figure was plotted using the Generic Mapping Tools (vision 5.4.4; URL:https://gmt-china.org/). (a) Disturbance propagation velocity of satellite G04: 1.53 km/s. (b) Disturbance propagation velocity of satellite G06: 1.67 km/s. (c) Disturbance propagation velocity of satellite G09: 0.43 km/s. (d) Disturbance propagation velocity of satellite G16: 2.31 km/s.
