Synchronous manifestation of 160-min pulsations of the ground pressure and Z-component of geomagnetic field at Moscow, Apatity, Oulu, Yakutsk and Tixie

Oscillations of the ground pressure and Z-component of geomagnetic field with a period of 160-min in December 2003 and March 2004 have been studied by regular measurements carried out over the territory of Europe and Siberia. As the analysis has shown, in December 2003 these specific oscillations are manifested synchronously from Europe up to Siberia, preferentially in the form of ʹpackagesʹ (ʹquantaʹ) consisting of two-five pulses. Their average amplitudes in December 2003 are of 0.0115±0.0023 mb in the ground pressure and of 0.323±0.070 nT in the Z-component. We suppose that the 160-min pulsations in those both terrestrial parameters represent the effect of a gravitational wave of the same period coming from the Galaxy center.