In 2021–2023 a task set before the seismologists was to conduct work on seismic zoning of the east Kazakhstan territory. The seismic stations network of that region is represented by two seismic arrays and two three-component stations of the IGR NNC RK and two three-component stations of the SEME MES RK. The work describes the parameters of the IGR NNC RK stations, estimates its capabilities in recording the events of different magnitudes at various distances. In 2002– 2020 the IGR NNC RK stations recorded almost 34000 events. After discrimination of explosions and its removal from the catalogue of seismic events the map of earthquakes epicenters at the east Kazakhstan territory that includes 28000 earthquakes was constructed. This material is one of the main informational components for seismic hazard assessment in this region.

We are analyzing recordings of local earthquakes in the regions of Eastern Kazakhstan and Western Altay, obtained by stations MAKZ and MKAR. We consider correlation dependence of maximum amplitudes ratio for Sn and Pn waves (Sn/Pn parameter) on distance. On the base of this dependence mapping of S wave attenuation field in the lithosphere of this region is carried out. A special attention is paid to high attenuation zones, comparison with seismicity is carried out. It is established, that the highest attenuation corresponds to the rupture zone of large Chu earthquake of 2003 (Mw=7.3). Besides, an anomaly of high attenuation is found in the area of Semipalatinsk test site (STS) and to the south of it. We discuss reasons of high shear wave attenuation in rupture zones of large earthquakes, and also within some sections of the STS.

The capability to record events of different magnitude at various epicentral distances (magnitude sensitivity of the station) was studied basing on representative statistical material ontained by the results of Karatayu seismic array operation for more than 10 years period. The dependence of magnitude sensitivity on azimuth of seismic waves arrival was studied. It is shown that depending on the direction, the station has different capabilities in recoding of small earthquakes at the same distance. The examples of small events recorded by Karatayu station are shown by a series of two explosions of shells at military warehouses in the south Kazakhstan in 2019 and 2021.

The paper presents the results of the development and manufacture, as well as assembly and installation of a test device for testing miniature samples by the SPT method. The results of mechanical tests by tensile and SPT methods of 35X steel material after heat treatment (quenching + tempering) at different tempering temperatures. The evaluation of changes in the strength characteristics of steel grade 35X, depending on the heat treatment mode. The correlation equations between the t/10 method and the yield strength of each 35X steel sample obtained during tensile tests were determined and obtained.

This paper describes the results of experiments on the interaction of hydrogen isotopes with lithium ceramics of different grades. The studies were carried out in two stages: a cycle of work on saturation of samples in a deuterium medium was conducted at a facility for studying the interaction of gases with materials (CorrSiC’a)) based on an industrial highvacuum tube furnace GSL-1600, at temperatures of 300 °C, 500 °C, 700 °C; hermal desorption (TDS) experiments at a facility, where the sample is heated by a non-contact method (induction heating) at a rate of 2 K/s and 10 K/s, at a pressure of residual gases in the installation chamber ~10−4 Pa. The values of the activation energy of deuterium gas release from lithium ceramics of different grades are obtained.

Radioactive isotopes of rare earth elements have effective nuclear-physical properties and are promising for the development of new therapeutic radiopharmaceuticals. Rare earth elements (REE) include 17 elements of the secondary subgroup of group III of the periodic table of chemical elements of D.I. Mendeleev with atomic numbers 21, 39, 57, 58–71: scandium, yttrium, lanthanum and 14 lanthanides. Some radioactive isotopes of these elements are already used in medicine, as a radioactive component of approved medicines, for example, the isotopes of ¹⁵³Sm and ¹⁷⁷Lu, and for some the possibility of their use in medicine is only being studied. Thus, the isotope scandium – ⁴⁷Sc is being studied as a potential radioisotope for cancer diagnosis, holmium – ¹⁶⁶Ho as an isotope for radiosynovectomy and brachytherapy, praseodymium – ¹⁴²Pr is promising for brachytherapy. The ability of rare earth elements to form chemical bonds with organic molecules, including peptides of natural and synthetic origin, is the basis for the development of new drugs for targeted therapy of breast and prostate cancer, neuroendocrine tumors, disseminated lung cancer and other types of diseases. To determine the list of the most promising for irradiation at the rector of the WWR-K REE in order to develop radioactive isotopes, an assessment of the ways of developing radioactive isotopes and an analysis of their nuclear physical characteristics according to literature data was carried out. Isotopes such as: ¹⁶⁶Ho, ¹⁶⁵Dy, ⁹⁰Y, ¹⁷⁵Yb, ¹⁵³Sm, ¹⁷⁷Lu, ¹⁴⁷Nd, ¹⁷⁰Tm, ¹⁵⁹Gd and ¹⁴¹Ce can be used in the treatment of oncological diseases. This research work makes it possible to evaluate the possibility of obtaining REE radioisotopes by reaction (n, γ) at the WWR-K reactor, and reflects the prospects for using these isotopes in the development of new-generation radiopharmaceuticals for the treatment of oncological diseases.

This research fulfills additional information about the lithosphere below Southeastern Asia and the northern Pacific. The area is interesting for researchers because of the Kuril–Kamchatka subducted lithosphere. The availability to study an underground structure is complicated, because of Pacific Ocean. The significance of this research concerns epicentral distances ~54°–70° or ~6000–7000 km. During the Cold War of the 20th century and the classification of information between the largest nuclear states the Soviet Union (USSR) and the United States of America (USA), data on the registration of nuclear explosions were not published, however, underground nuclear explosions (UNE) were recorded. Thanks to an employee of the laboratory 5-s of the Institute of Physics of the Earth named after O.Yu. Schmidt of the USSR Academy of Sciences Kh.D. Rubinstein is kept at the Institute for the Dynamics of Geospheres of the Russian Academy of Sciences named after Academician M.A. Sadovsky (IDG RAS). Only after 1985 reports from some seismic stations of the former USSR began to be published in the operational reports of the United Geophysical Survey of the Russian Academy of Sciences (GS RAS). As it has not been yet published anywhere, we collect them and obtain the travel times were by revising seismograms from the archives IDG RAS and GS RAS for five Kuril–Kamchatka seismic stations (Bering, Esso, Severo-Kurilsk, Kurilsk). The 48 Unites States UNE at Pahute Mesa (at Nevada Test Site) from 1968 to 1990 are used for travel time curve building. We measure P waves travel times (t_p) on historical seismograms for the ray travel path between Pahute Mesa tests and Kuril–Kamchatka stations. The body-waves magnitudes (mb) vary from 5.3 to 6.5. We obtain arrivals for: 1 UNE at Bering station, 7 UNE at Esso station, 45 UNE at Petropavlovsk, 18 UNE at Severo-Kurilsk and 12 at Kurilsk. We build a travel time function using linear regression algorithm as t_p=k·Δ°+b, where Δ° is the epicentral distance, k and b are arbitrary constants. We show that travel time deviations, associated with nonlinearity of the Earth. We estimate the effective velocities of P waves for the Pahute Mesa – Kuril–Kamchatka travel path as coefficient k in the linear equation. Effective velocity is equal to 7.5 km/s.

The paper presents information from the digitized register of underground nuclear explosions (UNE) of the Nevada test site from 1960 to 1975 stations of the Unitied Geophysical Survey USSR (EGGN USSR), preserved in the archives of the Institute of Geosphere Dynamics of the Russian Academy of Sciences named after M.A. Sadovsky (IDG RAS). Particular attention is paid to the records of those explosions that were registered by one, two or at most three stations. Such reports were checked for the presence of UNE records on seismograms in the archives of the IDG RAS and the Geophysical Survey RAS (FRC GS RAS). For these explosions at the found stations, the travel time of the primary body wave (t_p) was obtained. Tables of registration times and travel times for various phases of body waves are compiled. This material is intended to be the publication of a part of the consolidated catalog of registered UNEs of the Nevada test site to replenish the database on the travel times of seismic waves collected over the past two decades.