TY  - STD
AU  - G. Hubert, M. T. Pazianotto
PY  - 2019//
TI  - Analysis of the Forbush Decreases and Ground-Level Enhancement on September 2017 Using Neutron Spectrometers Operated in Antarctic and Midlatitude Stations
N2  - This work investigates solar events occurred in September 2017 characterized by a series of Forbush decreases and a ground level enhancement (GLE). Forbush decreases is a rapid decrease in the observed https://en.wikipedia.org/wiki/Galactic_cosmic_ray intensity following a coronal mass ejection while GLE is induced by a strong solar event for which the flux of high-energy solar particles is sufficient to enhance the radiation level on the ground. These investigations were performed using data recorded by a neutron spectrometer network composed of a Bonner sphere system. Two instruments located at Pic-du-Midi Observatory (+2,885 m above sea level) and at Concordia station (Antarctica, +3,233 m) record simultaneously and continuously the neutron spectra, allowing to consider short-term variations during solar events. The main objective is to analyze neutron spectral properties including their energy distributions and dynamics. This paper presents cosmic ray-induced neutron spectra during active solar event leading to changes in the local cosmic ray spectrum (Forbush decreases and a GLE). Concerning the GLE, analyses show that neutrons in the evaporation domain are particularly amplified during the GLE, while other energetic domains increase uniformly.
SN  - 2169-9402
SN  - 2169-9402
L1  - http://publi.ipev.fr/polar_references/files/yes
UR  - http://dx.doi.org/10.1029/2018JA025834
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=7556), last updated on Tue, 30 Nov 1999 00:00:00 +0100
ID  - G.Hubert2019
ER  -