Fig. 4

Time course (hourly) of the main components \(\left( Z_{1},Z_{2},Z_{3},Z_{4}\right)\) during the geomagnetic storm on March 17, 2015 for standardized initial data.

Time course (hourly) of the main components \(\left( Z_{1},Z_{2},Z_{3},Z_{4}\right)\) during the geomagnetic storm on March 17, 2015 for standardized initial data.