P. Diodati et S. Piazza, ULTRASONIC ACTIVITY PHASES MEASURED ON LIPARI, Nuovo cimento della Societa italiana di fisica. C, Geophysics and space physics, 16(3), 1993, pp. 315-318
Results obtained by measuring Ultrasonic Emission (UE) from volcanic r
ocks on Lipari island are reported. The lack of volcanic activity and
revealable volcanic tremor on Lipari, (two phenomena that, together wi
th magmatic tide, we hypothesize as the principal causes of UE on Stro
mboli) suggest Earth tide as responsible for UE generation on the rock
surface.