A statistical study of narrow-band ELF events observed at the South Pole

Details A statistical study of narrow-band ELF events observed at the South Pole A statistical study of narrow-band ELF events observed at the South Pole

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11b1754y&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM11B-1754

Physics

[2772] Magnetospheric Physics / Plasma Waves And Instabilities

Scientific paper

Whistler-like Extremely-Low Frequency (ELF) events were first observed by Heacock in 1974 and have since been documented by Sentman and Ehring (1994) Wang et al. (2005) and Kim et al. (2006), using data from near-equatorial to polar latitudes. Typically, these events begin with a narrow-band signature near 120 Hz, decreasing to ˜50 Hz over the course of perhaps a minute or two. The origin of these waves remains uncertain and motivates a statistical study to determine the number of events-per-day versus day-of-year. We find that, while observations appear to be clustered within the Austral summer months, a seasonal dependence is not obvious. We explore mechanisms for the generation of these narrow bandwidth events that include seasonal effects as well as the effects of astrophysical sources such as gamma ray bursts and meteor showers.

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