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Earth, Planets and Space
Figure 6 | Earth, Planets and Space

Figure 6

From: Characterization of the response of spring-based relative gravimeters during paroxysmal eruptions at Etna volcano

Figure 6

Laboratory equipment. Facility (a) used to test along the x, y, and z directions to determine the decoupling coefficient between high-frequency vertical and horizontal accelerations and the response of the Scintrex CG-3 M#9310234 (b) and LaCoste & Romberg D#185 gravimeters (c). The figures show the piezoelectric actuators placed below (b) and lateral to (c) the movable platform to induce vertical and horizontal accelerations, respectively. The vibration directions of the platform are also shown.

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