Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3208102w&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 8, CiteID L08102
Physics
3
Radio Science: Waves In Plasma (7867), Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Instruments And Techniques, Magnetospheric Physics: General Or Miscellaneous, Radio Science: Instruments And Techniques (1241)
Scientific paper
Detections of ELF whistler-like events at a low latitude location are reported. Events with frequencies between 60 and 100 Hz were recorded by the ELF station at the Lulin Observatory in Taiwan from August 26, 2003 to July 13, 2004. The most distinguished feature for these events is the frequency descent in the frequency-time spectrograms, resembling terrestrial whistlers. Other notable features include (a) a long event duration averaging up to two minutes, (b) a daytime diurnal maximum occurring around 10 am, (c) a dominant magnetic field polarization in the north-south direction with strength of a few to tens of pT, and (d) no detection of vertical electric fields. Similar events were only reported twice for the past thirty years: one at an auroral latitude site in Alaska and the other at a mid-latitude site in California. Possible source mechanisms including magnetosheath lion roars and lightning-generated whistlers are discussed.
Hsu Rue-Ron
Su Han-Tzong
Wang Kaiti
Wang Yun-Ching
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