A specific phenomenon, primarily observed in polar regions, involves the precipitation of ice crystals during periods of auroral activity. This event is characterized by the gentle settling of small, often hexagonal, ice formations from the atmosphere. These particles can be so fine that they appear to hang suspended in the air, creating a shimmering, ethereal effect.
The presence of this frozen precipitation is significant because it contributes to the overall energy budget of the upper atmosphere, affecting radiative transfer and potentially influencing atmospheric chemistry. Historically, observations of this occurrence have been linked to periods of heightened geomagnetic activity and the intensification of the auroral oval. Understanding its dynamics is crucial for refining atmospheric models and improving space weather forecasting capabilities.