Macotela, E. L., Němec, F., Manninen, J., Santolík, O., Kolmašová, I., & Turunen, T. ( 2019). VLF emissions with banded structure in the 16‐ to 39‐kHz frequency range measured by a high‐latitude ground‐based receiver. Geophysical Research Letters, 46, 14214– 14222. https://doi.org/10.1029/2019GL086127
VLF emissions with banded structure in the 16‐ to 39‐kHz frequency range measured by a high‐latitude ground‐based receiver
|Author:||Macotela, Edith L.1; Němec, František2; Manninen, Jyrki1;|
1Sodankylä Geophysical Observatory, University of Oulu, Sodankylä, Finland
2Faculty of Mathematics and Physics, Charles University, Prague, Czechia
3Department of Space Physics, Institute of Atmospheric Physics, The Czech Academy of Sciences, Prague, Czechia
|Online Access:||PDF Full Text (PDF, 7.7 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202002195960
American Geophysical Union,
|Publish Date:|| 2020-06-10
Very low frequency (VLF) emissions of natural origin were identified for the first time by analyzing 1‐hr ground‐based magnetic field spectrograms in the 0.2‐ to 39‐kHz frequency range. Data were used from the Kannuslehto radio receiver (L‐shell ~5.5), recorded during different campaigns between 2006 and 2019. The spectrograms exhibit banded structures, which consist of several strip elements that vary in time and frequency over the event duration. Statistical analysis of 95 events shows that they are observed in the frequency range that extends from 2 to ~37 kHz, and mainly appearing above 16 kHz. The events span from 4 to 110 min and occur in the evening sector (~17–01 magnetic local time), mostly during quiet geomagnetic conditions. Furthermore, they are primarily left‐handed polarized and are associated with bursts of lightning‐related radio emissions such as sferics and tweeks.
Geophysical research letters
|Pages:||14214 - 14222|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
115 Astronomy and space science
E. L. M. was supported partially by the Finnish Cultural Foundation (grant 00180689). The work of F. N. was supported by Czech Science Foundation (grant 18‐00844S). O. S. and I. K. acknowledge Czech Science Foundation (grant 17‐07027S) and the Praemium Academiae award from the Czech Academy of Sciences.
© 2019. American Geophysical Union.