Table 2

Interhemispheric characteristics of LSTID observed during geomagnetic storms. The total number of events analysed is 26. The first three-row group shows the distribution according to the LSTID geographic origin, the second according to interhemispheric appearance. Each group sums up to 26.

LSTID observed during geomagnetic storm periods 26
LSTID of high latitude origin propagating equatorward 14
LSTID of equatorial origin propagating poleward 3
LSTID of both high latitude and equatorial origin 9
LSTID observed in both hemispheres without interhemispheric circulation 16
LSTID with observed interhemispheric circulation 4
No conclusive results due to insufficient data in one hemisphere 6

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