Effects of Abrupt Variations of Solar Wind Dynamic Pressure on the High-Latitude Ionosphere

Table 1

An overview of the echoes statistics for the different subsets of the events under study. Is and Ds stand for Increases and Decreases of solar wind dynamic pressure, NH and SH stand for Northern and Southern Hemisphere.

Set of events	Number of events	Number of echoes
Quiet Is NH	73	2827600
Quiet Is SH	50	907922
Quiet Ds NH	35	1550229
Quiet Ds SH	29	621471
Disturbed Is NH	73	2490800
Disturbed Is SH	54	1091885
Disturbed Ds NH	42	1823510
Disturbed Ds SH	35	652196