In­dian sci­en­tists de­tect crack in Earth’s mag­netic shield

Te­le­scope in TN records galac­tic cos­mic ray bursts of 20 GeV last­ing 2 hours in 2015

The Asian Age - - Technomics -

The world’s largest and Cos­mic Ray Lab­o­ra­tory in most sen­si­tive cos­mic Ooty, Tamil Nadu, recorded ray mon­i­tor, lo­cated the cos­mic rays of about 20 in In­dia, has recorded a GeV last year last­ing for 2 burst of galac­tic cos­mic hours. The burst oc­curred rays that in­di­cates a crack when a gi­ant cloud of plasma in Earth's mag­netic shield. ejected from the so­lar The burst oc­curred when a corona, and mov­ing with a gi­ant cloud of plasma ejected speed of about 2.5 mil­lion from the so­lar corona kmph struck Earth, caus­ing struck Earth at very high se­vere com­pres­sion of speeds caus­ing mas­sive its mag­ne­to­sphere from 11 com­pres­sion of Earth's to 4 times the ra­dius of mag­ne­to­sphere and trig­ger­ing Earth. It trig­gered a se­vere se­vere ge­o­mag­netic ge­o­mag­netic storm that storm. The GRAPES-3 gen­er­ated aurora bo­re­alis muon te­le­scope lo­cated at and ra­dio sig­nal black­outs Tata In­sti­tute of in many high lat­i­tude Fun­da­men­tal Re­search's coun­tries, ac­cord­ing to the study pub­lished in the jour­nal Phys­i­cal Re­view Let­ters. Earth's mag­ne­to­sphere ex­tends over a ra­dius of a mil­lion km, which acts as the first line of de­fence, shield­ing us from con­tin­u­ous flow of so­lar and galac­tic cos­mic rays, thus pro­tect­ing life on Earth from high in­ten­sity en­er­getic ra­di­a­tions. Nu­mer­i­cal sim­u­la­tions per­formed by the GRAPES-3 re­searchers, in­clud­ing Pra­vata K Mo­hanty, in­di­cate that Earth's mag­netic shield tem­po­rar­ily cracked due to the mag­netic re­con­nec­tion, al­low­ing the lower en­ergy galac­tic cos­mic ray par­ti­cles to en­ter our at­mos­phere. Earth's mag­netic field bent these par­ti­cles about 180-de­grees, from the day-side to the night-side of the Earth where it was de­tected as a burst by the GRAPES-3 muon te­le­scope around mid-night on 22 June 2015. The data was an­a­lysed and in­ter­preted through ex­ten­sive sim­u­la­tion over sev­eral weeks by us­ing the 1280-core com­put­ing farm that was built in­house by the GRAPES-3 team. —

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