Open AccessArtificial and natural electromagnetic signals revealed during two years in the Amare cave (Central Italy)
Author(s) -
Francesco Bella,
R. Bella,
P. F. Biagi,
Michèle Caputo,
Giuseppe Della Monica,
A. Ermini,
W. Plastino,
Vittorio Sgrigna
Publication year - 1994
Publication title -
annals of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 60
eISSN - 2037-416X
pISSN - 1593-5213
DOI - 10.4401/ag-4161
Subject(s) - geophone , cave , geology , ranging , lightning (connector) , seismology , instrumentation (computer programming) , acoustics , geophysics , physics , geodesy , computer science , power (physics) , geography , archaeology , quantum mechanics , operating system
n 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