Open Access
Research Article

Fig. 4

image

Download original image

Observation geometry of (top) red glow and (bottom) white pillars in the geomagnetic coordinate by Memambetsu Magnetic Observatory (M, 34° magnetic latitude) and Aikawa Weather Station (A, 27.5° magnetic latitude). The top panel shows the top part of red glow with 45° elevation angle at M and with 15° elevation angle at A. The bottom panel shows the top part of white pillars with 60° elevation angle at M and with 20° elevation angle at A.

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.