Table 2

Summary of geomagnetic indices.

Index Time resolution Comment
Hp (incl. Hp90, Hp60, Hp30) 90, 60, 30 min Based on Kp method
Kp 3 h Sub-auroral and mid-latitude
AE (incl. AL, AU, AO) 1 min AE = AU − AL: overall electrojet activity; AO = 0.5(AU + AL): equivalent zonal current
PC 1 min Energy input from solar wind, merging electric field
Dst 1 h Magnetospheric ring current intensity
Wp 1 min Pi2-activity, timing of substorm onset

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.