Frekuensi ultra rendah
Frekuensi ultra rendah (ULF) adalah sebutan ITU[1] untuk rentang frekuensi gelombang elektromagnetik antara 300 Hertz dan 3 kHz, sesuai dengan panjang gelombang antara 1.000 hingga 100 km. Dalam ilmu magnetosfer dan seismologi, definisi alternatif biasanya diberikan, termasuk rentang dari 1 mHz hingga 100 Hz,[2] 1 mHz hingga 1 Hz,[3] dan 10 mHz hingga 10 Hz.[4]
Referensi
[sunting | sunting sumber]- ^ "Rec. ITU-R V.431-7, Nomenclature of the frequency and wavelength bands used in telecommunications" (PDF). ITU. Diarsipkan dari versi asli (PDF) tanggal 31 October 2013. Diakses tanggal 20 February 2013.
- ^ V. A. Pilipenko, "ULF waves on the ground and in space", Journal of Atmospheric and Terrestrial Physics, Volume 52, Issue 12, December 1990, pp. 1193–1209, ISSN 0021-9169, DOI:10.1016/0021-9169(90)90087-4.
- ^ T. Bösinger and S. L. Shalimov, "On ULF Signatures of Lightning Discharges", Space Science Reviews, Volume 137, Issue 1, pp. 521–532, June 2008, DOI:10.1007/s11214-008-9333-4.
- ^ O. Molchanov, A. Schekotov, E. Fedorov, G. Belyaev, and E. Gordeev, "Preseismic ULF electromagnetic effect from observation at Kamchatka Diarsipkan 2020-02-04 di Wayback Machine.", Natural Hazards and Earth System Sciences, Volume 3, pp. 203–209, 2003
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