Berlin 2014 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 5: Postersitzung
EP 5.17: Poster
Dienstag, 18. März 2014, 16:30–18:30, DO24 Foyer
The First Ground Level Event of Solar Cycle 24 and its longitudinal distribution** in the inner heliosphere — •B. Heber1, N. Dresing1, W. Dröge2, R. Goméz-Herrero3, K. Herbst1, Y. Kartavykh2, A. Klassen1, J. Labrenz1, O. Malandraki4, and R. Müller-Mellin1 — 1Christian-Albrechts-Universität, Kiel, Germany — 22Universität Würzburg, Germany — 3SRG, University of Alcalá, 28871, Alcalá de Henares, Spain — 43National Observatory of Athens, Greece
Ground level events (GLEs) are the most energetic solar particle events (SEPs) that are detected not only by space born instrumentation but also by ground*based instruments like e.g. neutron monitors. On May 17 2012 at 01:25 UT a M5.1 X-ray flare from the active region 1476 (N07, W88) was detected. The event was accompanied by a type III radio burst starting at 1.30 UT and a coronal mass ejection heading towards Stereo A. The corresponding shock wave passed STEREO A on May 18 at 12:43 UT but missed the Earth. The event onsets of near relativistic electrons have been detected at 06:05 UT, 03:38 UT, and 01:51 UT aboard STEREO A and B (125-335 keV) and at SOHO (250-700 keV), respectively. In contrast to observations close to the Earth no strong anisotropies have been observed at both STEREO A and B. The neutron monitor network recorded the first GLE for solar cycle 24. Data observed close to and at Earth will be presented and the longitudinal structure of the event in the inner heliosphere will be discussed.