Bugün öğrendim ki: "STEVE" (Güçlü Termal Emisyon Hızı İyileştirmesi) adlı, yüksek irtifalarda hareket eden sıcak plazma şeritlerinden oluşan, aurora borealis ile ilişkili ancak ondan farklı bir atmosferik fenomen var.
Atmospheric optical phenomenon, which appears as a light ribbon in the sky [![](//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Optical_Steve.jpg/220px- Optical_Steve.jpg)](/wiki /File:Optical_Steve.jpg) 'STEVE' on 17 August 2015 at Little Bow Resort, AB, Canada. **STEVE** (Strong Thermal Emission Velocity Enhancement) is an [atmospheric optical phenomenon](/wiki/Atmospheric_optics "Atmospheric optics") that appears as a purple and green light ribbon in the sky, named in late 2016 by [aurora] (/wiki/Aurora "Aurora") watchers from [Alberta, Canada](/wiki/Alberta "Alberta"). According to analysis of satellite data from the [European Space Agency](/wiki/European_Space_Agency "European Space Agency")'s [Swarm](/wiki/Swarm_\(spacecraft\) "Swarm \(spacecraft\)") mission, STEVE is caused by a 25 km (16 mi) wide ribbon of hot [plasma](/wiki/Plasma_\(physics\) "Plasma \(physics\)") at an altitude of 450 km (280 mi), with a temperature of 3,000 °C (3,270 K; 5,430 °F) and flowing at a speed of 6 km/h (3.7 mi/s) (compared to 10 m/s (33 ft/s) outside the ribbon). The phenomenon is not rare, but had not previously been investigated.[1][2][3]