Question

Auroras are frequently seen
A. near the equator.
B. after solar flares.
C. before a sunspot cycle.
D. every 11 years.

Answer 1

According to this page

http://en.wikipedia.org/wiki/Aurora

it says

"Large magnetic storms are most common during the peak of the eleven-year sunspot "

Answer 2

so that sounds like it happens every 11 years, but that doesn't mean they don't happen at any other time (they're just less frequent)

Answer 3

Auroras are frequently seen after a solar flare. They are seen throughout the sunspot cycle, although there peaks and troughs, and they are appear in the pole region and not at the equator. The Aurora is created by an influx of particles into the Earth's magnetic field - these particles originate from the Sun as part of the Solar Wind. A solar flare is a large eruption of solar particles from the Sun and therefore aurora often follow their occurrence.

Answer 4

Thank you both!