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CRACK IN EARTH'S MAGNETOSPHERE

The world's largest and most sensitive cosmic ray monitor, GRAPES-3 Muon telescope located at Tata Institute of Fundamental Research's Cosmic Ray Laborotory in Ooty in Tamil Nadu recorded a burst of galactic cosmic rays of about 20 GeV (Gigaelectron volt,  1GeV= 10^9 eV) on 22 June 2015 which lasts for two hours. The burst occurred when a giant cloud of plasma ejected from the solar corona and moved with a speed of about 2.5 million kilometres per hour struck earth, caused a severe compression of earth's magnetosphere from 11 to 4 times the radius of earth, causing a severe geomagneting storm that generated Aurora Borealis and radio signal blackouts in many high latitudes countries like Norway, Greenland, Northern Canada, Siberia, Arctic Ocean. Earth's magnetosphere extends over a radius of million kilometres, which acts as the first line of defence against harmful solar and galactic cosmic rays -protecting life on earth from these high intensity energetic radiations. 

GRAPES-3 (Gamma Ray Astronomy PeV EnergieS phase-3) is designed to study cosmic rays with an array of air shower detectors and a large area muon detector. 
A supersonic shock wave is created sunward of Earth called the Bow Shock
Earth's magnetosphere damaged by cosmic rays
Image taken from laboratory 
A Crack opened in Earth's magnetic field and plasma starts pouring into it
Given below a video describes
   about this incident 

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