Titre du document

Auroral x?rays, cosmic rays, and related phenomena during the storm of February 10–11, 1958

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Nom du Corpus

AstroConcepts

Auteur(s)
  • J. R. Winckler
  • L. Peterson
  • R. Hoffman
  • R. Arnoldy
Résumé

Balloon observations were made during the auroral storm of February 10–11, 1958, at Minneapolis. Strong x?ray bursts in two groups were detected. The groups appeared coincident with two large magnetic bays, with strong radio noise absorption, and with the passage across the zenith of a very large amount of auroral luminosity. From the x?ray intensity and measured energies, an electron current of 0.6×106 electrons/cm2/sec was present. These electrons ionizing the upper D layer accounted for the increased cosmic noise absorption. The X?rays themselves carried 1000 times less energy than the electrons and could not provide sufficient ionization for the observed radio absorption. Visual auroral forms during this storm are reported to have lower borders at the 200 to 300 km level. There is thus a difficulty in bringing the electrons to the D layer without an accompanying visible aurora. A cosmic?ray decrease accompanied the storm and was observed to be from 4 to 6 per cent at sea level, 21 per cent in the balloon altitude ionization, and 15 per cent in total energy influx at 55° geomagnetic latitude. Compared with the great intensity of the magnetic and auroral phenomena in this storm, the cosmic?ray modulation was not exceptionally large.

Langue(s) du document
Anglais
Année de publication
1959
Revue

Journal of Geophysical Research

Éditeur
Wiley
Type de publication
journal
Type de document
article
Présence de XML structuré
Non
Version de PDF
1.2
Score de qualité du texte
9.4
Nom du concept
  • Forbush decrease
Catégories Science-Metrix
  • 1 - natural sciences ; 2 - earth & environmental sciences ; 3 - meteorology & atmospheric sciences
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Palaeontology
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Space and Planetary Science
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Earth and Planetary Sciences (miscellaneous)
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Atmospheric Science
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Earth-Surface Processes
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Geochemistry and Petrology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Soil Science
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  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Geophysics
Catégories WoS
  • 1 - science ; 2 - geosciences, multidisciplinary
Identifiant ISTEX
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