Geomagnetic storm sparks vibrant Auroras, lights up the Canadian sky
VIIRS detected the auroras on November 29, around 2:30 a.m. local time (08:30 Universal Time) which brightened the sky over mainland Nunavut and Hudson Bay in north-eastern Canada.
Aurora Lights are a natural light display that shimmers across the sky in the Northern hemisphere.
They are commonly known as the northern lights; they are caused by the minor geomagnetic storm in Earth’s magnetosphere.
A geomagnetic storm is a major disturbance of Earth's magnetosphere that occurs when there is a very efficient exchange of energy from the solar wind into the space environment surrounding Earth. (MEMA).
The Particles carried by the solar wind on November 29, were moving almost 700 kilometres. (430miles) per second and they had sparked the minor geomagnetic storm.
Solar winds are those winds which are streamed from an area of relatively cooler material in the solar atmosphere, known as a coronal hole.
The picture acquired by VIIRS looks very much informative to the observers on earth and in space the aurora appear to the astronauts as dynamic, colourful displays of light.
VIIRS, was able to deject the aurora light because it has a day-night band which detects the night-time light in a range of wavelengths from green to near-infrared.
VIIRS uses filtering techniques to observe signals such as city lights, reflected moonlight, and auroras.
NASA says, "Coronal holes are regions on the Sun where the magnetic field is open to interplanetary space, sending solar material speeding out in a high-speed stream of solar wind."