Foucault pendulum
Results confirming observation of the Allais and Jeverdan-Rusu-Antonescu effects during the annular solar eclipse of September 22, 2006 were presented the following year by a Romanian team, with a quantization of the behavior of the paraconical pendulum. During the solar eclipse of August 1, 2008, a Ukrainian team and two Romanian teams worked together hundreds of kilometers apart with different apparatuses: five independent miniature torsion balances for the Ukrainian team, two independent short ball-borne pendulums for a Romanian team and a long Foucault pendulum for the third team. All three teams detected unexplained and mutually correlated disturbances. The same teams repeated a dual experiment during the annular solar eclipse of January 26, 2009, this time outside of the umbra, with the same significant correlation between the behavior of light torsion balances and a Foucault pendulum. They also registered similar anomalies using a Foucault pendulum and a very light torsion balance, both located underground in a disused salt mine with minimal interference, during the partial solar eclipse of June 1, 2011.