The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
권호 표지

Onset time analysis of solar proton events

  • Hwang, Jung-A (Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute) ;
  • Cho, Kyung-Suk (Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute) ;
  • Lee, Jae-Jin (Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute) ;
  • Kocharov, Leon (Space Research Lab, Department of Physics and Astronomy, University of Turku) ;
  • Krucker, Sam (Space Sciences Lab.) ;
  • Kim, Yeon-Han (Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute) ;
  • Park, Young-Deuk (Solar and Space Weather Research Group, Korea Astronomy and Space Science Institute)
  • Published : 2010.10.06
Download PDF
⟨ Previous Next ⟩

Abstract

We analyzed onset times of the largest six solar proton events during 1997-2006 of solar cycle 23, as observed at 1AU by two satellites of GOES/SEM (Geostationary Operational Environmental Satellites/the Space Environment Monitor) and SOHO/ERNE (Solar and Heliospheric Observatory/the Energetic and Relativistic Nuclei and Electron). We adopted the time shifted method suggested by Leon Kocharov and determined the path length by Sam Krucker's fitting method. We found some problems of those methods and tried to improve those. In this presentation, we will give details of the energy spectra of the 6 SPE events from the ERNE/HED, and onset time comparison among the SPE, flare, type II burst, and CME.

Keywords