Weather

What are red sprites and blue jets?

These are both atmospheric and electrical phenomena that take place in the upper atmosphere, and
are also known as upper-atmosphere discharge. They take place above normal lightning; blue jets
occur around 40-50 kilometres (25-30 miles) above the Earth, while red sprites are higher at 50-100
kilometres (32-64 miles). Blue jets happen in cone shapes above thunderstorm clouds, and are not
related to lightning. They’re blue due to ionised emissions from nitrogen. Red sprites can appear as
different shapes and have hanging tendrils. They occur when positive lightning goes from the cloud to
the ground.

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