How to See the Northern Lights: A Beginner's Guide

Activity comes first. The solar wind has to disturb Earth's magnetic field enough to push the auroral oval toward you. How far depends on your latitude: near the Arctic Circle a quiet night can still give you a display, and in a southern city you need a storm.

Sky and darkness come next. Aurora happens high above the weather, so cloud blocks it completely. And it is faint, so twilight, city lights and a bright moon wash it out. If one of the three is missing, the other two do not help.

The moon is the extra condition. A full moon lights the whole sky and hides faint displays, while a thin crescent hardly matters. If you have a choice of nights, pick the one nearer the new moon.

Kp is a scale from 0 to 9 that measures how disturbed Earth's magnetic field is. Kp 5 is a minor geomagnetic storm, which NOAA labels G1, and higher values are stronger storms. The Kp index page explains where the number comes from.

A high Kp does not mean you will see the aurora, and a low Kp does not mean you will not. The number that matters is the Kp your location needs. Fairbanks sits under the auroral zone, so a modest value works. Seattle is much further south, so it takes a lot more.

Every city page on this site shows the threshold for that place and says whether tonight reaches it. The methodology page explains how the thresholds are set. If the live Kp is at or above your local one and the sky is clear, go out.

The most common window is roughly 10 PM to 2 AM local time, when your location is on the night side of Earth, facing the tail of the magnetosphere. That is a guide, not a rule. Substorms are short bursts of activity, and they can start at 8 PM or at 4 AM.

In practice: step outside when the forecast is promising, stay for at least an hour, and keep checking the live data. Brightening usually comes in bursts of ten to thirty minutes. If you leave during a quiet stretch, you might miss the best part.

In winter at high latitudes it is dark by late afternoon, so you have more hours to work with. In summer you may have to wait until after midnight, or until there is no twilight at all.

Face the pole: north in the northern hemisphere, south in the southern. In the auroral zone, such as Fairbanks, a display can climb overhead, so look up too. At mid-latitudes, you are looking at the top of an aurora far away, so the glow sits low on the horizon.

You want an unobstructed view in that direction. A lake shore, a field, a hilltop or a beach facing the pole is better than a dark spot with trees in the way. Drive away from the city until the light dome is behind you. The map shows the live oval, so you can tell how far toward you the aurora is reaching.

At mid-latitudes, a faint glow is easy to mistake for cloud or light pollution. Take a photo: a camera usually shows the green or pink when your eyes see only a pale smudge. See aurora colors for why.

Your eyes need about 20 minutes to adjust to the dark, and a single glance at a bright screen resets part of that. Turn your phone brightness down and use red-light or night mode where you can. A headlamp with a red setting helps you walk without ruining your night vision.

For photos, put the phone on something steady, such as a tripod, a wall or the car roof. Turn on night mode or set a long exposure, and aim for a few seconds. Turn the flash off, and tap on the sky to focus, or set focus to infinity if your camera allows. Shorter exposures keep the aurora's shape if it is moving fast.

Cold drains batteries quickly. Keep a spare in an inside pocket and put the phone away between shots.

Bring more warm clothing than you expect to need. You will stand still for an hour. Add a thermos, spare gloves, a headlamp and a tripod, and tell someone where you are going. Carry a charged phone and a car with enough fuel.

The common mistakes are simple:

• Going out before your eyes have adapted and deciding there is nothing to see.
• Checking the Kp number but not the cloud forecast.
• Staying under street lights or inside the city light dome.
• Looking the wrong way, or at the zenith from a mid-latitude place.
• Leaving after the first quiet ten minutes.
• Planning a single night, with no spare for clouds.

If you live at a mid-latitude, such as Edinburgh or Calgary, expect to be disappointed on most nights and to be rewarded on a few. That is normal. Use the live status and your city page, and go when the numbers line up.