Ionospheric turbulence from ground-based and satellite VLF/LF transmitter signal observations for the Simushir earthquake (November 15, 2006)

Alexander Rozhnoi (1) , Maria Solovieva (1) , Michel Parrot (2) , Hayakawa Masashi (3) , Pier Francesco Biagi (4) , Konrad Schwingenschuh (5)

1 IPE - Schmidt United Institute of Physics of the Earth [Moscow]
2 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
3 UEC - University of Electro-Communications [Tokyo]
4 Dipartimento di Fisica
5 IWF - Space Research Institute of Austrian Academy of Sciences

Signals from very low frequency (VLF)/ low frequency (LF) transmitters recorded on the ground station at Petropavlovsk-Kamchatsky and on board the French DEMETER satellite were analyzed for the Simushir earthquake (M 8.3; November 15, 2006). The period of analysis was from October 1, 2006, to January 31, 2007. The ground and satellite data were processed by a method based on the difference between the real signal at night-time and the model signal. The model for the ground observations was the monthly averaged signal amplitudes and phases, as calculated for the quiet days of every month. For the satellite data, a two-dimensional model of the signal distribution over the selected area was constructed. Preseismic effects were found several days before the earthquake, in both the ground and satellite observations. Nombre de références:

Keywords: Seismic risk; VLF/LF signal propagation; Eartquake precursors; Wave propagation

Domains: Geophysics [physics.geo-ph]

Alexander Rozhnoi, Maria Solovieva, Michel Parrot, Hayakawa Masashi, Pier Francesco Biagi, et al.. Ionospheric turbulence from ground-based and satellite VLF/LF transmitter signal observations for the Simushir earthquake (November 15, 2006). Annals of Geophysics, 2012, 55 (1), pp.187-192. ⟨10.4401/ag-5190⟩. ⟨insu-01295678⟩