Auroral activity captured at Hanle by IIA’s all-sky camera

Auroral enactment was captured by the all-sky camera astatine the Indian Astronomical Observatory successful Hanle, Ladakh, connected the nights of January 19 and 20. This is the sixth clip during the existent star rhythm the aggravated reddish coloured auroral enactment was captured.

The Indian Institute of Astrophysics (IIA), which operates the observatory, said that the aurora seen astatine Hanle was owing to a beardown geomagnetic tempest which began astatine astir 3.30 a.m. connected January 20.

“The tempest reached its maximum strength astatine 8.30 p.m. connected January 20, with a highest disturbance of −218 nano Tesla,” it said.

Interaction with CME

According to NASA’s space-based remote-sensing observations, the tempest resulted from the enactment of a coronal wide ejection (CME) that was launched from the prima astir 1.30 p.m. connected January 18.

The CME originated from Active Region 14341 adjacent the centre of the star disk and was expelled astatine a velocity of astir 1,400 km/s. It was associated with an X1.9 star flare and accompanied by star energetic particles. In presumption of space-weather severity, the lawsuit is classified arsenic a G4-level geomagnetic tempest with an S4 radiation level.

“During the ongoing 25th star cycle, lone six geomagnetic storms with intensities exceeding −200 nT person been recorded, which person the imaginable to origin debased latitudinal arorae. A coronal spread was observed implicit a ample country surrounding the progressive region, which whitethorn person facilitated the CME’s accelerated propagation toward world wrong astir 28 hours,” said P. Vemareddy, a star astrophysicist astatine the Indian Institute of Astrophysics.

Physical mechanism

Using a operation of ground-based and space-based observations, scientists astatine IIA are actively investigating the carnal mechanisms down these storms to amended recognize the sun’s power connected earth.

IIA said that CMEs are ample expulsions of billions of tonnes of plasma and its associated magnetic fields from the prima into the interplanetary space, immoderate of which tin deed the world and nutrient geomagnetic storms.

“Extreme geomagnetic storms person the imaginable to harm space-technology babelike quality beingness connected Earth, specified arsenic disrupting vigor communication, GPS signals, etc. Predicting these storms is an important country of technological probe astatine IIA and galore different institutions successful India arsenic well,” IIA said.