how long does an aurora last?

Question

(Science)

Answer 1

Aurora are generate by charged particles captured by the terrestrial magnetic field impacting atoms in the upper atmosphere and generating flourescence. They constantly shift shape and color as the magnetic fields shift around and the particle flux changes. As such, asking how long an aurora lasts is akin to asking how long a cloud in a hurricane lasts; the question itself is too vague to answer with confidence.

Answer 2

Since it comes from charged particles striking our atmosphere, it depends on what specific event caused it (was it a large solar flare?). Seems like they tend to last between a few minuets and a few days (fluctuating at certain times). The one I saw lasted probably an hour or two (visibly, though it was likely reacting with the atmosphere much longer) and looked like ripples in the sky.

Answer 3

It can last anywhere from a few minutes to a few days. I've actually seen one last for 3 days.... For more information I suggest you look at the University of Alaska Fairbanks and their Geophysical Institute.

Answer 4

I doubt there is a specific length of time.