Red Sprites and Blue Jets

Appearing as cone bursts, glows or bright discharges, blue jets and red
sprites occur only in the upper atmosphere,

and are therefore very faint and often not visible to the naked eye.

[image: diagram]
*Eurekalert<http://www.eurekalert.org/features/kids/2005-10/cp-ssa101305.php>
*

These natural phenomena have a lifespan of only a few hundred milliseconds
at most so capturing them on camera

is very difficult. However, the Danish National Space Centre have placed
cameras on mountain tops to study how elves

and sprites are created, how often they occur and what it means for the
environment.

*Red Sprite:*
[image: red sprite]
NASA <http://umbra.nascom.nasa.gov/spd/sprites.html>
Red Sprites are found above large thunderstorms and are often associated
with larger cloud-to-ground lightning flashed.

They are at their most luminous high in the atmosphere and last only a few
thousandths of a second.

*Blue Jet:*
[image: blue sprite]

Blue jets are discharged around thunderstorms and extend for many miles up
into the atmosphere. It’s thought

they provide a mechanism for energy transfer between thunderclouds and the
lower ionosphere.


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