RE: Geomagnetic Storm

Well, with extreme phenomena that only happen every few or even decades, there might be a chance of seeing the aurora even in the Caribbean! In the 21st century, there were maybe 2-3 such events. As for the colors, the further from the Arctic Circle, the more they behave. It all depends on the aurora's strength. In weak conditions, only the green aurora, visible in the polar zone, is produced. In stronger phenomena, it takes on various colors: red, purple, green, pink, and even blue! In Poland, where I live, pink/purple is the most common.

Best regards!