TY  -  
T1  - Analysis of Ground Level Enhancements (GLE) : Extreme solar energetic particle events have hard spectra 
SN  -  /  
UR  - http://hdl.handle.net/10138/308035 
T3  -  
A1  - Asvestari, E.; Willamo, T.; Gil, A.; Usoskin, I. G.; Kovaltsov, G. A.; Mikhailov, V. V.; Mayorov, A. 
A2  -  
PB  -  
Y1  - 2017 
LA  - eng 
AB  - Nearly 70 Ground Level Enhancements (GLEs) of cosmic rays have been recorded by the worldwide neutron monitor network since the 1950s depicting a big variety of energy spectra of solar energetic particles (SEP). Here we studied a statistical relation between the event-integrated intensity of GLEs (calculated as count-rate relative excess, averaged over all available polar neutron monitors, and expressed in percent-hours) and the hardness of the solar particle energy spectra. For each event the i... 
VO  -  
IS  -  
SP  -  
OP  -  
KW  - Solar energetic particles; Cosmic rays; COSMIC-RAY EVENTS; PROTON EVENTS; SPACE; CYCLE; 115 Astronomy, Space science 
N1  -   
PP  -  
ER  -