@InProceedings{DalLago:2022:OrICHi,
               author = "Dal Lago, Alisson",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Origins of ICME-Sheath high intensity magnetic fields and their 
                         geomagnetic impacts",
                 year = "2022",
         organization = "COSPAR Scientific Assembly, 44.",
             abstract = "In this work we study high intensity magnetic fields in ICME 
                         sheath regions. These high intensity fields are short duration 
                         when compared to the total duration extent of the ICMEs but they 
                         often drive intense geomagnetic disturbances. The selection of the 
                         events is via visual inspection of interplanetary data observed by 
                         L1 interplanetary monitors. We sort these events by their magnetic 
                         field profile: a very high intensity B within the sheath, followed 
                         by a smooth region, which could be interpreted as the ICME. We 
                         look at their solar counterparts and study their dynamics from the 
                         Sun to the Earth. As expected, our findings show that high speed 
                         coronal mass ejections (CMEs) are related to the occurrence of 
                         these high intensity sheath magnetic fields. However, we find 
                         important exceptions which deserve more careful study. To evaluate 
                         the geomagnetic impacts we use the Disturbance Storm-time Dst 
                         index. In the context of Space Weather, it is known that shock 
                         sheath fields are a very important origin of energy injection in 
                         the Earths magnetosphere.",
  conference-location = "Athens, Greece",
      conference-year = "16-24 July 2022",
             language = "en",
           targetfile = "POIS.1-0018-22-poster.pdf",
        urlaccessdate = "21 maio 2024"
}