Würzburg 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
EP: Fachverband Extraterrestrische Physik
EP 8: Poster Session
EP 8.1: Poster
Mittwoch, 21. März 2018, 17:00–18:30, BSZ - Pabel HS
GLE72 as seen by Neutron Monitors — •Christian Steigies1, Dennis Galsdorf1, Rolf Bütikofer2, Athanasios Papaioannou3, and Christos Sarlanis4 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel — 2Physikalisches Institut, Universität Bern, Schweiz — 3IAASARS, National Observatory of Athens — 4ISNet Co, Athens
On 10 September 2017 the main sunspot group was the active region 2623. It produced a major X8.2 solar flare, which started on 15:35 UT and peaked at 16:06 UT. At that time this active region was situated at S08W88 on the Sun. The flare was further accompanied by a halo CME, which was recorded by SOHO/LASCO as well as by the STEREO coronographs. The estimated speed of the CME was 3287.6 km/sec. After 16:10 UT several ground based neutron monitors measured an increase in their counting rate caused by the arrival of solar energetic particles (SEPs) (i.e. relativistic protons). The maximum count rate increase, in the 5-minute averaged data, was about 10%. It was observed by the Dome C neutron monitor station in Antarctica. This ground level enhancement (GLE) event, on 10 September 2017 was only the second one after the event on 15 May 2012 (GLE71) in the current solar activity cycle. With the GLE Inversion software developed in the Horizon 2020 project HESPERIA (http://www.hesperia-space.eu) we try to determine the characteristics of the relativistic proton injected into the interplanetary space from the acceleration region at or near the Sun based on data of the worldwide network of neutron monitors publically available from the NMDB database (http://nest.nmdb.eu).