The northern lights are among the most spectacular natural phenomena a photographer can capture. They occur when charged particles from the sun interact with Earth's magnetic field and atmosphere, creating curtains and waves of green, purple, and pink light dancing across the sky.
Inverza uses the Kp geomagnetic index (adjusted for your latitude - higher latitudes need lower Kp values), cloud cover (must be below 30%), and darkness level (sun must be at least 12 degrees below the horizon). At mid-latitudes, you need a strong geomagnetic storm (Kp 5+) to see aurora; near the Arctic Circle, Kp 2 can be enough.
Tip: Use a fast wide-angle lens (f/2 or faster), ISO 1600-3200, and 8-25 second exposures. A sturdy tripod is essential. Face north (or follow the predicted direction) and find a composition with a foreground element - water reflections work beautifully.
