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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 12 (1948), S. 121-126 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Die in Uppsala registrierte Bodenunruhe ist für die Zeit 1907–1947 betreffs langperiodischen Schwankungen untersucht worden. Eine 11-jährige Variation wird festgestellt und es gibt weiter Anzeichnungen einer Variation von 28 Monaten. Die 11-jährige Variation ist seit 1923 zur Sonnenflecken-frequenz negativ korreliert und ist durch entsprechende meridionale Verschiebungen der am meisten betretenen Zyklonenbahnen, erklärt.
    Abstract: Riassunto L'agitazione microsismica registrata a Uppsala nel quarantennio 1907–1947 venne esaminata in vista di determinare le oscillazioni di lungo periodo. Si è accertata una oscillazione undecennale, trovandosi altresi indizi per una oscillazione di 28 mesi. Dal 1923 l'oscillazione undecennale manifesta una correlazione negativa con la frequenza delle macchie solari e viene spiegata con i corrispondenti spostamenti meridionali delle rotte cicloniche dominanti.
    Notes: Summary The microseisms recorded at Uppsala have been studied for the time 1907–1947 with regard to long period variations. There is clear evidence of an 11 year variation and slight indications of a 28 month variation. The 11 year variation is from 1923 negatively correlated to the sunspot frequency and is explained by corresponding meridional displacements of the dominant cyclonic tracks.
    Type of Medium: Electronic Resource
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