"Storage Ring"-Remnant New Slot-Like Outer Limit of of previous outer belt minimum Outer Belt the PlasmaSphere Re-energization a Typical 2-Belt New 3-Belt Outer Belt Structure Structure Dropout Rs8gbeBer6. Slot Region Inner Electron Radiation Belt 600. 400 20 0 -50 -100 2012-08-31 2012-09-10 2012-09-20 2012-09-30 2012-10-10 Fig.3.(A)Similar to panel(B)of Fig.1 but including the plasmapause,the outer boundary of the plasmasphere(26)for the period 1 September to 7 October 2012.The white curve over-plotted upon the color-coded electron particle flux data in Fig.3A shows the modeled,3-day averaged plasmapause radial location that is in agreement with concurrent plasma wave data (17,27,28).(B)The concurrently measured solar wind speed upstream of the Earth's magnetosphere.(C)The interplanetary magnetic field for the interval under study.(D)The geomagnetic activity index Dst for the period under study Sciencexpress/http://www.sciencemag org/content/early/recent /28 February 2013/Page 6/10.1126/science.1233518/ http://www.sciencemag.org/content/early/recent / 28 February 2013 / Page 6 / 10.1126/science.1233518 Fig. 3. (A) Similar to panel (B) of Fig. 1 but including the plasmapause, the outer boundary of the plasmasphere (26) for the period 1 September to 7 October 2012. The white curve over-plotted upon the color-coded electron particle flux data in Fig. 3A shows the modeled, 3-day averaged plasmapause radial location that is in agreement with concurrent plasma wave data (17, 27, 28). (B) The concurrently measured solar wind speed upstream of the Earth’s magnetosphere. (C) The interplanetary magnetic field for the interval under study. (D) The geomagnetic activity index Dst for the period under study. on March 6, 2013 www.sciencemag.org Downloaded from