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Three-dimensional reconstruction of the expanding shock associated with the 21st June 2013 solar energetic particle event

Federica Frassati - Istituto Nazionale di Astrofisica - INAF; Monica Laurenza - Istituto Nazionale di Astrofisica - INAF-IAPS, Italy; Alessandro Bemporad - Istituto Nazionale di Astrofisica - INAF, Italy; Salvatore Mancuso - Istituto Nazionale di Astrofisica - INAF, Italy; Paolo Romano - Istituto Nazionale di Astrofisica - INAF, Italy; Roberto Susino - Istituto Nazionale di Astrofisica - INAF, Italy; Tommaso Alberti - Istituto Nazionale di Astrofisica - INAF-IAPS, Italy; Matthew West - Royal Observatory of Belgium - ROB, Belgium

Session: The Solar Sources of Space Weather


On 21st June 2013 an eruptive prominence and a M2.9 class flare occurred. The eruption resulted in a fast partial halo coronal mass ejection producing a Type II radio burst which yielded a clear signature of shock propagation, also observed in white light coronagraphic images. The concomitant emission of solar energetic particles produced a significant increase in the proton fluxes measured by LET and HET aboard STEREO-B. Only small enhancements were observed at STEREO-A location and GOES-15 at the Earth.

We reconstructed the 3D shape of the expanding shock front by processing the STEREO/SECCHI and SOHO/LASCO simultaneous coronagraphic observations and by assuming a spheroidal shock model.

By projecting the 3D shock locations at different times on the ecliptic plane we obtained that during the expansion the region located between the nose and the eastern flank of the shock was magnetically connected with STEREO-B in agreement with the significant SEP flux measured on-board this spacecraft. On the other hand, the shock was only marginally connected with STEREO-A and GOES-15. These results were used to interpret the different SEP flux behavior at STEREO-B, STEREO-A, and GOES-15 locations, and discussed in the framework of particle acceleration by CME-driven shocks. 



Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020