Adit-based linear strain measurements made with strainmeters 1 to 100 m long allow oscillation processes to be studied in a wide range: from a few tens of hertz to several years. Both seismic waves from earthquakes and long-period oscillatory signals are recorded, related to tectonic processes. The paper describes measurements made with rod and laser strain metering systems in an adit of the Talaya seismic station (coordinates 51.68 degrees N, 103.65 degrees E, Lake Baikal Region). The elastic moduli of rocks were evaluated using strainmeter, microbarograph data, and petrophysical core analysis. The Earth's integral rheological parameters, through the Earth's free and tidal oscillations, are calculated. Our findings are in good agreement with modern models of the Earth's internal structure. The paper describes coseismic and long-term volumetric strain variations induced by large regional earthquakes.
