Low-latitude ELF Whistler-like Events Observed in Taiwan

Details Low-latitude ELF Whistler-like Events Observed in Taiwan Low-latitude ELF Whistler-like Events Observed in Taiwan

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm22a..02w&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM22A-02

Other

7871 Waves And Instabilities, 7894 Instruments And Techniques, 7899 General Or Miscellaneous, 6964 Radio Wave Propagation, 6984 Waves In Plasma

Scientific paper

Whistler-like events between 60 to 100 Hz have been detected in the ELF station operated by NCKU-ISUAL team at the Lulin Observatory, Taiwan (120o52'E, 23o28' N, 2862m high) from August 20, 2003 to July 29, 2004. The most distinguished feature is the frequency descent in the frequency-time spectrograms, resembling terrestrial whistlers. Other features of the ELF events include(a) a long event duration up to 2 minutes, (b) a daytime diurnal maximum occurring around 10 am, (c) a dominant magnetic field polarization in the north-south direction with strength at a few to tens of pT, and (d) no detection of vertical electric fields...etc. For the past 20 years, similar events were only reported twice, one at the auroral latitude (Heacock, 1974) and the other at the mid-latitude (Sentman and Ehring, 1994). Possible source mechanisms have been discussed are (a) magenetosheath lion roars propagating along the TEM-mode waveguide in the earth-ionosphere cavity, and (b) hiss detected in the equator. Lightning-generated whistlers are not favored in previous studies because of being unable to interpret the observed long dispersions with the electron density environment but all the mechanisms remain open questions. References Heacock, R.R., Whistler-like pulsation events in the frequency range 20-200Hz, Geophys. Res. Lett., 2, 77, 1974. Sentman, D. D., D. A. Ehring, Midlatitude detection of ELF whistlers. J. Geophys. Res., 99, 2183, 1994.

Affiliated with

Also associated with

No associations

Rating

Low-latitude ELF Whistler-like Events Observed in Taiwan does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Low-latitude ELF Whistler-like Events Observed in Taiwan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-latitude ELF Whistler-like Events Observed in Taiwan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1465729