Skip to main content
Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

From: Post-midnight purple arc and patches appeared on the high latitude part of the auroral oval: Dawnside counterpart of STEVE?

Fig. 7

a Schematic illustration showing the relative location of STEVE and phenomena reported in this paper. The circle is the Earth, and the green region is an auroral oval. STEVE appears pre-midnight and equatorward of the oval, while our events were found post-midnight and poleward part of the oval. The blue arrows show FAC and Pedersen current. The yellow arrows show the geomagnetic field lines. b–c Possible generation mechanism of DAPS and the purple glow. b The difference in the number of careers (electrons) makes the spatial gradient of the conductivity. c Spatial gradient of the conductivity makes a strong electric field in Region 1, especially near the boundary between Regions 1 and 2. The strong electric field makes a fast eastward drift speed

Back to article page