aurora borealis?

Nope. The aurora will be attracted to the poles of the earth. It will give the equator a miss.

Highly unusual but not impossible - it depends upon the strength of the magnetic storm that produces the aurora.

Having said that, the only recent one that I can find recorded is that on December 16th 2006 when the aurora was seen as far south as Arizona, but this is still way further north than you are.

I would be almost certain that what you saw was not an aurora but would have to be some other form of atmospheric phenomenon caused by (perhaps) volcanic activity, excess dust in the air. Difficult to pin down without a date.

It's possible, but it would be extremely rare, because you're very far from the Earth's magnetic poles. I know one or two aurorae have been seen as far south as Florida in North America during the past solar cycle.

I'm not sure about your reference to a rainbow. Aurorae are seen only at night and rainbows only during the day, so the two aren't comparable in any way. Also aurorae are usually diffuse and unorganized, while rainbows are sharp and circular in shape.

acot_anthonym: You are wrong about aurora's colour. They are very frequently red...I've seen this many many times, and many photographs show it.

No....we cannot see aurorae near the equator....if we can see aurorae near the equator then the solar flares would have been so strong that they would distrupt our communications.....or else earth's magnetic field has nearly dissappeared....which wud not happen without the astronomers creatin a real hue and cry....u might probably have witnessed some other phenomenon..

also called the Nothern lights, it is seen as green ghostly clouds never have they been red.

you just asked this question, in case you missed it here is an answer again good luck