OBSERVATIONS ON SURFACE TILTS WITH QUARTZ TILTOMETERS AT THE IZMIRAN STATION IN 2002-2003

摘要

Observations are reported on surface tilts measured with a quartz tiltometer at the IZMIRAN geophysics station between 1 January 2002 and 21 December 2003. The dry summer of 2002 lowered the groundwater level by 5.5 m, which led to a tilt in the E-W azimuth by 82 arcsec (to the west). Spheroidal and torsional oscillations in the Earth due to an Altai earthquake.