Based on the joint analysis of the seismic regime parameters, such as anomalies of seismic energy release, b-value, seismic activity A10, approaches to assess the state of the block-seismic medium are proposed. The method validation was done for the example of preparation and development of seismic activity in 2008-2011 in the Central part of the Baikal rift, during which there were 2 strong M5.3 earthquakes. It was found that within 2 years before the strong Maximihinskoye Earthquake of 2008 in the Earth's crust of the epicentral region there is a transformation from softening to strengthening (consolidation) of the block medium. At the same time, in the neighboring region (the area of the Svyatoy Nos Peninsula), the opposite nature of the changes is observed.

Complex interpretation of seismic and parametric drilling data is performed. The data for interpretation are obtained within the conjunction zone of the Kureyka syncline and the Anabar anteclise. As a result of complex interpretation the structural maps on the bottom of Vendian and the top of the Kuonamka formation are constructed. Map of the Vendian terrigenous complex was constructed. High prospects of oil and gas potential of the lower-middle Cambrian sediments are shown. Based on the analysis of logging data, core description and detailed correlation of time sections, the litho-acoustic models were compiled for two profiles crossing the barrier-reef system, and two-dimensional synthetic time sections were calculated. Obtained results confirm the correctness of the ideas about the internal structure of the Vendian-Cambrian complexes.

High-performance algorithm for an unmanned magnetometer complex data inversion is proposed. We provide numerical tests for tomographic inversion of data for the different-height magnetic surveying. We show the results of calculations for a test model with a magnetic object in the form of a cylinder of finite height. We propose the recommendations for the method application for the inversion of the observed data.

The article describes the modern version of the equipment for the autonomous temperature monitoring in boreholes and reservoirs. To characterize the capabilities of the equipment, the results of the long-term measurements of the temperature of Vasyugan swamp (Tomsk region) peatlands and the bottom (water and sediment) of lakes Baikal and Teletskoye are presented.

The paper discusses the method of multichannel analysis of surface waves. We propose an automated method of surface waves extraction, based on the time-frequency representation of seismograms and their subsequent spatial spectral analysis. This approach is robust for the extraction of smooth and realistic dispersion curves in automatic mode. This provides a more reliable assessment of high-velocity sections of shear waves by the method of multichannel analysis of surface waves. The article presents the results of testing of the developed approach with using noisy synthetic and real seismic data.