Villante U, Vellante M, Piancatelli A. Ultra low frequency geomagnetic field measurements during earthquake activity in Italy (September-October 1997). Ann. Geophys. [Internet]. 2001Dec.25 [cited 2024Apr.26];44(2). Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3594