Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1850
AuthorsBella, F.* 
Bella, R.* 
Biagi, P. F.* 
Caputo, M.* 
Della Monica, G.* 
Ermini, A.* 
Plastino, W.* 
Sgrigna, V.* 
TitleArtificial and natural electromagnetic signals revealed during two years in the Amare cave (Central Italy)
Issue DateNov-1994
Series/Report no.37/5 supl
URIhttp://hdl.handle.net/2122/1850
Keywordselectromagnetic signals
earthquakes precursors
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous 
Abstractn 1990, some instrumentation was set up in the Amare cave (southern slope of the Gran Sasso chain, L'Aquila) in order to pick up electric signals ranging from 0.3 to 300 kHz, magnetic signals from 0.3 to 30 kHz and seismoacoustic signals by means of three geophones with natural frequencies of 0.3 kHz, 25 kHz and 150 kHz. Data are recorded every ten minutes on a solid state memory. The analysis of the data allows us to establish the existence of electromagnetic fields of distant origin connected with broadcastings and with tropical lightning activity and the discontinuous presence of local electric and magnetic signals, coupled with seismoacoustic ones, connected with weather events. A qualitative explanation of these near fields is given.
Appears in Collections:Annals of Geophysics

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