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@Article{AdhikariSapBarChaBra:2017:ImCoIn,
               author = "Adhikari, Binod and Sapkota, Nirakar and Baruwal, Prashrit and 
                         Chapagain, Narayan P. and Braga, Carlos Roberto",
          affiliation = "{Tribhuvan University} and St. Xavier’s College, Maitighar and 
                         {Tribhuvan University} and {Tribhuvan University} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Impacts on cosmic-ray intensity observed during geomagnetic 
                         disturbances",
              journal = "Solar Physics",
                 year = "2017",
               volume = "292",
               number = "10",
                pages = "Article number 149",
                month = "Oct.",
             keywords = "Geomagnetic disturbances, Storm, Substorm, Moderate storm, 
                         HILDCAA, Neutron monitor data.",
             abstract = "Geomagnetic disturbances are the results of interplanetary causes 
                         such as highspeed streamers (HSSs), interplanetary coronal mass 
                         ejections (ICMEs), corotating interaction regions (CIRs), and 
                         magnetic clouds. During different forms of geomagnetic 
                         disturbances, we observed changes in the count rate at neutron 
                         monitors that are kept at various locations. We studied the count 
                         rates measured by neutron monitors at four stations at various 
                         latitudes during different categories of geomagnetic events and 
                         compared them. We analysed five events: a geomagnetically quiet 
                         event, a non-storm high-intensity long-duration continuous AE 
                         activity (HILDCAA) event, a storm-preceded HILDCAA event, a 
                         geomagnetic substorm event, and a geomagnetic moderate storm 
                         event. We based our analysis on geomagnetic indices, solar wind 
                         parameters, and interplanetary magnetic field (IMF) parameters. We 
                         found that the strength of the modulation was least during the 
                         quiet event and highest during the storm-preceded HILDCAA. By 
                         analysing the cause of these geomagnetic disturbances, we related 
                         each decrease in the neutron monitor data with the corresponding 
                         solar cause. For the ICME-driven storm, we observed a decrease in 
                         neutron monitor data ranging from 6% to 12% in all stations. On 
                         the other hand, we observed a decrease ranging from 2% to 5% for 
                         the HSS-driven storm. For the non-storm HILDCAA, we observed a 
                         decrease in neutron monitor data of about 1% to 1.5%. For the 
                         quiet event, the neutron monitor data fluctuated such that there 
                         was no overall decrease in all stations.",
                  doi = "10.1007/s11207-017-1183-3",
                  url = "http://dx.doi.org/10.1007/s11207-017-1183-3",
                 issn = "0038-0938 and 1573-093X",
             language = "en",
           targetfile = "binod_impacts.pdf",
        urlaccessdate = "04 dez. 2020"
}


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