Relative Fluxes in Shock and Prompt Peaks in SEP Profiles

Details Relative Fluxes in Shock and Prompt Peaks in SEP Profiles Relative Fluxes in Shock and Prompt Peaks in SEP Profiles

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh13a0298m&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH13A-0298

Physics

7859 Transport Processes, 7984 Space Radiation Environment

Scientific paper

One of the outstanding issues in SEP event modeling and forecasting is the importance of the shock arrival or ESP peak relative to the prompt peak. Toward understanding the conditions under which one predominates, we analyzed a set of prototypical event time profiles obtained between 1997 and 2005 by instruments on ACE (EPAM), IMP-8 (CPME), and GOES spacecraft. Relative fluxes of the shock (ESP) and prompt peaks were evaluated at approximately 1, 10, and 50 MeV and organized by the longitude of the related solar event. As expected, the shock peak was dominant at the lowest energy range when the profiles included both peaks. However, even at 10 MeV the shock peak is often comparable to the prompt peak, suggesting that models and forecasts need to include both peaks in their concepts for simulation and/or prediction.

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