Fig. 3

Local (a) and integrated (b) Hall, Pedersen, and Hall-to-Pedersen ratio (from the top to the bottom) color maps between 90 and 120 km calculated with the magnetic field-line-integrated conductivity model at 12 LT on February 7, 2001, at the São Luís Space Observatory (SLZ), Brazil. Local Hall and Pedersen conductivities are multiplied by a factor of 10⁴