|Green||No significant activity||Aurora is unlikely to be visible by eye or on camera from Shetland.|
|Yellow||Minor geomagnetic activity||Aurora likely to be visible on camera from Shetland.|
|Amber||Amber alert: aurora likely||Aurora is likely to be visible by eye from Shetland.|
|Red||Red alert: strong aurora is likely||Aurora is likely to be clearly visible by eye from Shetland.|
These alert meanings and levels may be tweaked based on user feedback.