Skip to main content
SpringerLink
Log in

On very-low-frequency atmospherics at Roburent, Northern Italy

  • Published:
pure and applied geophysics Aims and scope Submit manuscript

Summary

The diurnal and seasonal variation of the VLF sferics pulse rate recorded at Roburent, Northern Italy, on 27 kHz since 1966 is derived. By analyzing the sunrise effect, the minimum distance of the thunderstorm centers providing at that time an unperturbed behaviour of the sferics pulse rate is obtained: this distance varies in azimuth and with the seasons and lies between 600 and 1300 km. In the time of the equinoxes, however, it is more stable between 700 and 900 km. The role of the groundwave propagation, generated by thunderstorm center within a radius of less than 500 km, is emphasized.

Zusammenfassung

Der Tagesgang und der Jahresgang der Sferics-Impulshäufigkeit werden abgeleitet. Diese Sferics-Häufigkeit ist seit 1966 auf 27 kHz in Roburent, in Nord-Italien, registriert worden. Der Mindestabstand der Gewitterherde, welche zur Zeit des Sonnenaufgangs ein ungestörte Bild der Impulshäufigkeit geben, wird mit Hilfe des Sonnenaufgangseffekts abgeleitet: der Abstand liegt — abhängig von der Jahreszeit und der Einfallsrichtung — zwischen 600 und 1300 km; jedoch bewegt er sich in dem engeren Rahmen zwischen 700 und 900 km zur Zeit der Tag-und Nachtgleichen. Betont wird die Rolle der Bodenwelle, welche von Gewitterherden in einem Abstand von weniger als 500 km erzeugt wird.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. G. Heydt andH. Volland,A new method for locating thunderstorms and counting their lightning discharges from a single observing station, J. Atmos. Terr. Phys.26, (1964), 780–783.

    Google Scholar 

  2. J. Rieker,Le lever du Soleil dans l'ionosphère et ses répercussions sur la propagation des ondes longues, Geofis. pura e appl.46, (1960/II) 241–328.

    Google Scholar 

  3. W. L. Taylor,Lightning characteristics as derived from sferics; in:Problems of Atmospheric and Space Electricity (editor:S. C. Coroniti) Elsevier Publ. Comp., Amsterdam, 1965, 388–404.

    Google Scholar 

  4. J. Lugeon etG. Nobile,Leradiomaxigraphe enregistreur d'intensité des parasites atmosphériques de la Station Centrale Suisse de Météorologie, Annalen der Schweizerischen Meteorologischen Zentralanstalt (1938).

  5. M. Bossolasco, I. Dagnino andG. Flocchini,Itemporalisul Mediterraneo edil tempo in grande, Geofis. e Meteor.XV (1966), 113–129.

    Google Scholar 

  6. R. V. Anderson,Universal diurnal variations in Air-Earth current density, J. Geophys. Res.74 (1969), 1697–1700.

    Google Scholar 

  7. G. A. Kume, R. Knut andCh. U. Wagner,Theory of Sunrise Effects in the Lower Ionosphere based on measurements of Long Wave Absorption, Geomagn. and Aeron. (English Edit.)9 (1969). 828–833.

    Google Scholar 

  8. L. Thomas andM. R. Bowman,Atmospheric penetration of ultraviolet and visible radiations during twilight periods, J. Atmos. Terr. Phys.31 (1969), 1311–1322.

    Google Scholar 

  9. G. T. Nestorov,Sunrise effects in the Lower D-Region by Solar Eclipse, Pure and Appl. Geophys.71 (1968/III), 5–14.

    Google Scholar 

  10. G. T. Nestorov,The Cosmic Layer in the Low Ionosphere is a reality, Comptes Rendus de l'Académie Bulgare des Sciences,23 (1970), 57–59.

    Google Scholar 

  11. P. Kaufmann, W. Lopes andR. E. Schaal,Some results obtained with VLF atmospherics measurements at São Paulo, Brazil, J. Atmos. Terr. Phys.29 (1967), 207–212.

    Google Scholar 

  12. C. A. Schoute-Vanneck andA. G. Wright,27 kHz atmospherics observed at sunset and sunrise in South Africa, J. Atmos. Terr. Phys.30 (1968), 609–619.

    Google Scholar 

  13. R. P. Harrison, J. L. Heckscher andE. A. Lewis,Helicopter observations of very low frequency radio waves over certain mountains and shore lines, J. Atmos. Terr. Phys.33 (1971), 101–110.

    Google Scholar 

  14. J. Frisius, G. Heydt andW. Harth,Observations of parameters characterizing the VLF atmospherics activity as functions of the azimuth, J. Atmos. Terr. Phys.32 (1970), 1403–1422.

    Google Scholar 

  15. A. D. Watt,VLF Radio Engineering, Pergamon Press, Oxford 1967, 180–193.

    Google Scholar 

Download references

Authors
  1. M. Bossolasco
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. Caneva
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. I. Dagnino
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A. Elena
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. G. Flocchini
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Contribution No. 241 of the Istituto Geofisico e Geodetico, Università di Genova,Genoa, Italy. This work has been supported by a grant from the Consiglio Nazionale delle Ricerche (Comitato Nazionale per le Scienze Fisiche), Roma.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Bossolasco, M., Caneva, A., Dagnino, I. et al. On very-low-frequency atmospherics at Roburent, Northern Italy. PAGEOPH 100, 174–184 (1972). https://doi.org/10.1007/BF00880238

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00880238

Keywords

Search

Navigation