Figure 12From: Characterization of the response of spring-based relative gravimeters during paroxysmal eruptions at Etna volcanoCoupling factors K ( h ) z (a) and K ( z ) z (b) of the Scintrex CG-3 M#9310234 gravimeter. The factors were calculated considering the instrumental response and the amplitude of the horizontal (a, vibration amplitude 1.0 mg) and vertical (b, vibration amplitude 0.5 mg) excitations at different frequencies.Back to article page