caa a22 4500 44583031X CHVBK 20180317145313.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10686-011-9242-5 doi (NATIONALLICENCE)springer-10.1007/s10686-011-9242-5 Connection among spacecrafts and ground level observations of small solar transient events [Elektronische Daten] An overview of small solar transient events observed at ground [Carlos Augusto, Anderson Fauth, Carlos Navia, Hisatake Shigeouka, Kin Tsui] An overview of the results of the search for small solar transient events, in association with muon enhancements (deficits) registered at ground-level by the Tupi muon telescopes, is presented. Among the events, there are three interplanetary shocks and two solar flares of small scale whose X-ray emission flux is much smaller than 10 − 5W m−2 at 1 AU (GOES-Tupi connection). Two of the interplanetary shocks are cataloged as corotating interaction region and the third shock is due to the passage of a CME (coronal mass ejection) ejecta (ACE and SOHO-Tupi connection) in the Earth's proximities. In most cases, the particles excess (deficit) coming from these events have only been observed with spacecraft instruments. However, the Tupi telescopes are located at sea level and within the South Atlantic Anomaly (SAA), a region where the shielding effect of the magnetosphere is not perfectly spherical and shows a ‘dip'. This fact enables the muon telescopes to achieve a low rigidity of response to primary and secondary charged particles (≥ 0.1 GV). Muon excesses (deficits) with significances above 4σ have been found. These events observed at ground admit a temporal correlation with solar transient events observed by spacecrafts, which suggests strongly a real connection between them. Details of these observations are reported. Springer Science+Business Media B.V., 2011 Solar physics nationallicence Solar energetic particles nationallicence Ground level enhancements nationallicence Augusto Carlos Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut Fauth Anderson Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, 13083-970, Campinas, SP, Brazil aut Navia Carlos Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut Shigeouka Hisatake Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut Tsui Kin Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut Experimental Astronomy Springer Netherlands 31/2-3(2011-10-01), 177-197 0922-6435 31:2-3<177 2011 31 10686 https://doi.org/10.1007/s10686-011-9242-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10686-011-9242-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Augusto Carlos Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut NATIONALLICENCE 700 1- Fauth Anderson Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, 13083-970, Campinas, SP, Brazil aut NATIONALLICENCE 700 1- Navia Carlos Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut NATIONALLICENCE 700 1- Shigeouka Hisatake Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut NATIONALLICENCE 700 1- Tsui Kin Instituto de Física, Universidade Federal Fluminense Niteroi, 24210-130, Niteroi, RJ, Brazil aut NATIONALLICENCE 773 0- Experimental Astronomy Springer Netherlands 31/2-3(2011-10-01), 177-197 0922-6435 31:2-3<177 2011 31 10686 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer