STEVE Phenomenon

After a severe solar storm struck Earth, the astronomical phenomena known as "Strong Thermal Emission Velocity Enhancement (STEVE)" made an unexpected appearance

About STEVE phenomenon

STEVE first emerged in the skies in 2017, and since then, he has returned frequently.
The assertion that the phenomena have been visible in the sky since 1705 is supported by evidence.
It is an extremely uncommon, enigmatic, luminous purple arc that appears nearer to the equator and extends from east to west.

Why does it happen?

The phenomenon is thought to be created by a 25 km wide ribbon of hot plasma travelling at an altitude of 450 km at a speed of 6 km/s (compared to 10 m/s outside the ribbon).
Between October and February, it has been seen in New Zealand, Canada, Alaska, and the United Kingdom, which has led NASA experts to conclude that its prevalence is tied to seasons.

What distinguishes it from the Aurora Borealis?

Auroras are brought on by changes in the Earth's magnetosphere brought on by the solar wind.
Due to the acceleration of the solar wind brought on by coronal holes and coronal mass ejections, these disturbances take place.
While STEVE, the Auroras, and the skylights may appear to be identical, they are quite different.
To start, STEVE is a phenomenon that occurs nearer the equator than on the poles.
Although STEVE is not like a typical aurora, it is powered by the auroral system and is formed of light.

Also, Read - Dornier Maritime Surveillance Aircraft

Source: National Geographic

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