@Article{Gonzalez-AlarconGDTALBHW:1998:MaClFi,
               author = "Gonzalez-Alarcon, Walter Dem{\'e}trio and Gonzalez, Alicia Luisa 
                         Clua and Dal Lago, Alisson and Tsurutani, B. T. and Arballo, J. K. 
                         and Lakhina, G. S. and Buti, B. and Ho, C. M and Wu, S. T",
                title = "Magnetic cloud field intensities and solar wind velocities",
              journal = "Geophysical Research Letters",
                 year = "1998",
               volume = "25",
               number = "7",
                pages = "963--966",
                month = "Apr.",
             keywords = "GEOFISICA ESPACIAL, velocidade do vento solar, nuvens 
                         magn{\'e}ticas, fluxo magn{\'e}tico, tempestade magn{\'e}tica, 
                         origens, solar wind velocity, magnetic clouds, magnetic storms.",
             abstract = "For the sets of magnetic clouds studied in this work we have shown 
                         the existence of a relationship between their peak magnetic field 
                         strength and peak velocity values, with a clear tendency that 
                         clouds which move at higher speeds also possess higher core 
                         magnetic field strengths. This result suggests a possible 
                         intrinsic property of magnetic clouds and also implies a 
                         geophysical consequence. The relatively low field strengths at low 
                         velocities is presumably the cause of the lack of intense storms 
                         during low speed ejecta. There is also an indication that this 
                         type of behavior is peculiar for magnetic clouds, whereas other 
                         types of non cloud-driver gas events do not seem to show a similar 
                         relationship, at least for the data studied in this paper. We 
                         suggest that a field/speed relationship for magnetic clouds, as 
                         that obtained in our present study, could be associated with the 
                         cloud release and acceleration mechanism at the sun. Since for 
                         magnetic clouds the total field tyically has a substantial 
                         southward component, Bs, our results imply that the interplanetary 
                         dawn-dusk electric field, given by v x Bs (where v is the cloud's 
                         velocity), is enhanced by both factors. Therefore, the consequent 
                         magnetospheric energization (that, is governed by this electric 
                         field) becomes more efficient for the occurrence of magnetic 
                         storms.",
                 issn = "0094-8276",
                label = "9577",
           targetfile = "1998_gonzalez.pdf",
        urlaccessdate = "23 maio 2024"
}