PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - SH - Solar & Heliospheric
Forbush decrease on September 6-13, 2017 observed by the Tanca water-Cherenkov detector
Presented by R. de Aguiar* and A. Campos Fauth  on behalf of V. Agosín, A. Alberto Morillas, C. Álvarez Ochoa, J. Araya, R. Arceo, O. Areso, L.H. Arnaldi, H. Asorey, M. Audelo, M.G. Ballina Escobar, D.C. Becerra Villamizar, X. Bertou, K.S. Caballero Mora, R. Caiza, R. Calderón-Ardila, J.M. Calle, E. Carrera Jarrín, L.E. Castillo Delacroix, C. Castromonte, D. Cazar-Ramirez, D. Cogollo, D.A. Coloma Borja, R. Conde Sanchez, J. Cotzomi Paleta, D. Dallara, S. Dasso, A. de Albuquerque Silva, J.H. de Andrade Pacheco Reis, H. De León, R. De León Barrios, D. Domínguez, M. Echiburu, M. González, M. Gómez Berisso, J. Grisales Casadiegos, A.M. Gulisano, J.C. Helo, C.A. Huanca, J.E. Ise, G. Kelly Matias do Nascimento, M.A. Leigui de Oliveira, F. Lock Miletto, V.P. Luzio, F. Machado, J.F. Mancilla Cáceres, D. Manriquez, A. Martinez, O.M. Martinez Bravo, R. Mayo-Garcia, L.G. Mijangos Fuentes, P. Miranda, M.G. Molina, I.R. Morales Argueta, O.G. Morales Olivares, E. Moreno Barbosa, P. Muñoz, C. Nina, L.A. Núñez, L. Otiniano, R. Pagán Muñoz, K.M. Parada Jaime, H.M. Parada Villamizar, R. Parra, J. Peña-Rodríguez, M. Pereira, Y.A. Perez Cuevas, H.E. Pérez Figueroa, J. Pisco-Guabave, M. Raljević, M. Ramelli, C.S. Ramírez Mollinedo, H. Rivera, L.T. Rubinstein, A.J. Rubio-Montero, J.R. Sacahui Reyes, H. Salazar Ibarguen, N. Salomón, J. Samanes, N.A. Santos, C. Sarmiento-Cano, I. Sidelnik, M.B. Silva Carranza, O. Soto, M. Suárez-Durán, M. Subieta, J.C. Terrazas, R. Ticona, T. Torres Peralta, P. Ulloa, Z.d.R. Urrutia de Gutierrez, N. Vásquez, A. Vázquez-Ramírez, A. Vega, P. Vega, J. Vega, A. Vesga-Ramirez, D. Vitoreti and R. Wiklich Sobrinhoet al. (click to show)
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Pre-published on: July 29, 2021
Published on: March 18, 2022
Abstract
Solar activity was intense in September 2017 and its effects were observed in different detectors placed at the Earth's surface. Three halo Coronal Mass Ejections (CME) hit the planet and caused magnetic storms. The effects of the CMEs on the flux of galactic cosmic rays at ground level were observed by the Tanca detector, which is one of the water-Cherenkov detectors (WCD) that make up the Latin American Giant Observatory (LAGO). In this paper we present the detection of Forbush events observed by Tanca during the month of September 2017. This WCD is installed on the campus of the University of Campinas, in Brazil, having three photomultiplier tubes that detect Cherenkov photons produced by cosmic radiation in 11400 liters of ultra pure water. We present the description and performance of the experimental apparatus and the observation on days 6$^{\textrm{th}}$, 8$^{\textrm{th}}$ and 13$^{\textrm{th}}$ of the Forbush events originated by the CMEs. A decrease in the cosmic rays flux due to a stream inTeraction region was also observed on 14$^{\rm{th}}$ September. These results were compared with observations made by neutron monitors and indices of the Earth’s magnetic activity.
DOI: https://doi.org/10.22323/1.395.1267
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