author = "Echer, Ezequiel and Alves, Maria Virg{\'{\i}}nia and 
                         Gonz{\'a}lez-Alarcon, Walter Dem{\'e}trio and Gonzalez-Alarcon, 
                         Alicia Luisa Clua de and Balmaceda, L. A. and Santos, C. and 
                         Vieira, Luiz Eduardo Antunes and Dal Lago, Alisson and Guarnieri, 
                         Fernando Lu{\'{\i}}s",
                title = "Comparison between april 1999 and february 2000 solar-terrestrial 
                         connection events: interplanetary aspects",
            booktitle = "Anais...",
                 year = "2003",
         organization = "Latin American Workshop on Plasma Physics, 10; Brazilian Meeting 
                         on Plasma Physics, 7. (S{\~a}o Pedro, SP, Brazil, 2003).",
             keywords = "f{\'{\i}}sica b{\'a}sica de plasma, geomagnetic storms.",
             abstract = "The strong geomagnetic storms on April 17th 1999 (Dst peak = -91 
                         nT) and on February 12th 2000 (Dst peak = -131 nT) were caused by 
                         different interplanetary structures. The April 1999 event was 
                         caused by a south-north fast magnetic cloud, which drove an 
                         interplanetary shock detected at 1 astronomical unit (UA) at 10:30 
                         UT on April 16th 1999. This interplanetary shock had Alfvenic Mach 
                         number of about 2.5. The magnetic cloud arrived at UA around 23:00 
                         UT on April 16th and ended around 19:00 UT on April 17th. The 
                         southward component of the interplanetary magnetic field remained 
                         above -10 nT for 5 hours, with peak value of -14 nT. The February 
                         2000 event was caused by the interaction of two interplanetary 
                         remnants of coronal mass ejections. Two interplanetary shocks were 
                         detected on February 11th 2000 at 02:00 and at 23:00 UT. These 
                         shocks had Alfvenic Mach numbers of about 2.0 and 2.8, 
                         respectively, and were driven by interplanetary ejecta. The first 
                         interplanetary ejecta arrived at 1 UA around 16:00 UT on February 
                         11th. However, it was engulfed by the second one around 20:00 UT 
                         on the same day, creating an intense and highly turbulent 
                         southward magnetic field, which remained above -10 nT for 3 hours, 
                         with peak value of -16 nT. In this paper the interplanetary 
                         aspects of these two solar-terrestrial connection events are 
                         analyzed and compared. Plasma and magnetic field data obtained 
                         from sensors on board ACE spacecraft orbiting L1 point are used.",
  conference-location = "S{\~a}o Pedro, 2003",
      conference-year = "2003",
           copyholder = "SID/SCD",
             language = "en",
           targetfile = "comparison.pdf",
        urlaccessdate = "2021, Jan. 19"