Abstract We present the world's first time series acquired in summit area of an active volcano with absolute atom interferometry gravimeter. The device was installed ∼2.5 km from craters Mt. Etna and produced a continuous high–quality gravity series, despite unfavorable environmental conditions at installation site occurrence phases high volcanic tremor during acquisition interval. Comparison d...

The spectral structure of the earth tides which have been observed during one year by an Askania gravimeter at Kyoto, and that of the corresponding theoretical tides on a rigid earth, were compared to determine the tidal factor of gravity and the phase lag with a high precision. A band-pass filter that has dominant responses only for semidiurnal or diurnal frequencies was applied to both of the...

In the past, the gravitational acceleration on the surface of the Earth, g has been measured in many ways. Various methods include the use of a pendulum as well as models involving the use of a mass on a spring. We have designed a new method incorporating the mass-spring model with a capacitor, and a capacitance meter. This capacitor model still uses a hanging mass on a spring, but alters the m...