The appearance of aurora in the evening skies rise and fall in frequency with sunspot numbers, and there are maxima in March and September when the Earth in its orbit is in a better location with respect to the Sun to get 'blasted' by solar storms in the mid-latitude zones of the Sun.
Auroras occur in the mesospere.
They occur in the Mesosphere.
The Mesosphere
Auroras occur most frequently during the mostintense phase of the 11-year sunspot cycle.
They occur in the thermosphere.
September to October and April to May
Si Siñor
yes it occurs in the ionosphere
They occur day and night, but are more easily seen during the night.
Ionosphere of Near northern hemisphere polar regions
The auroras that are experienced near the polar regions occur because of the strength of the earth's magnetic field. The magnetic field is not very strong at the equator.
They occur the northern atmospheres. Closer to the magnetic poles where the solar storms hit the earth the hardest.