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AuthorsVillante, U.* 
Vellante, M.* 
Piancatelli, A.* 
TitleUltra low frequency geomagnetic field measurements during earthquake activity in Italy (September-October 1997)
Issue DateApr-2001
Series/Report no.44/2
KeywordsULF emission
earthquake precursors
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 
AbstractDifferent methods with different results have been proposed in the scientific literature to identify the possible occurrence of weak seismo-magnetic ULF emissions. In September-October, 1997 Central Italy was struck by repeated seismic activity (M L < 5.8). A simple amplitude analysis of the geomagnetic field variations (horizontal components, in the frequency range 4-100 mHz) at a geomagnetic facility located 65-85 km from epicenters of major earthquakes does not reveal in this case any clear evidence for possible ULF emissions.
Appears in Collections:Annals of Geophysics

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