ON THE SEISMICITY AND SEISMIC POTENTIAL OF THE ZHAMBYL REGION OF KAZAKHSTAN
ЖАМБЫЛ ОБЛЫСЫНЫҢ СЕЙСМИКАЛЫҚ ЖАҒДАЙЫ МЕН СЕЙСМИКАЛЫҚ ҚАУІПТІЛІГІ ЖАЙЛЫ
О СЕЙСМИЧНОСТИ И СЕЙСМИЧЕСКОМ ПОТЕНЦИАЛЕ ЖАМБЫЛСКОЙ ОБЛАСТИ КАЗАХСТАНА
Nurmagambetov A. Danabaeva A.T. Sailaubayeva Z.A. Katubayeva A.M.
2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025Issue 5240 - 252 pp.
The article is devoted to the analysis of the seismic situation in the territory of Zhambyl region. To ensure the safety of the population, it is important to specify the level of seismic hazard, which is associated with the rapid growth of urbanized areas. Conducted Regional and local seismicity of the Zhambyl region were studied. The earthquake representativeness is estimated by accumulating the number of earthquakes over different observation periods. Macroseismic manifestations of strong earthquakes and patterns of attenuation of the intensity of concussions in the study area are studied. Maps of earthquake epicenters and epicenter densities were constructed, which led to the conclusion that the main seismic activity is observed in the southern and southeastern parts of the region, confined to the Kyrgyz and Talas Alatau ranges, with the western end of the Ile Alatau and with the transition to the Shu-Ili Mountains. In the eastern and western parts of the Zhambyl region, seismic activity is moderate, while the northern part of the territory is characterized by a relatively low level of seismicity. Maps of probabilistic seismic hazard assessment (VSO) for the territory of Zhambyl region in MSK-64(K) scores were developed using the Open Quake Engine software. Maps are presented in two versions: a)-with a probability of exceeding the estimated intensity of earthquakes of 10% within 50 years (the average period of occurrence of earthquakes of 475 years); b)-with a probability of exceeding the estimated intensity of earthquakes of 2% within 50 years (the average period of occurrence of 2475 years). Thus, the seismic potential of the Zhambyl region is quite high – the possible magnitudes of strong earthquakes with foci in these zones are up to 6.5, while the intensity of concussions in the south of the region can reach up to 8-9 points. Maps of probabilistic seismic hazard assessment (VSO) for the territory of Zhambyl region in MSK-64(K) points have been developed and can be used in the development of building codes and regulations during construction.
earthquake , isoseists , seismic generating zones , seismic hazard , seismic regime , seismicity
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National Scientific Center for Seismological Observations LLP and research Ministry of Emergency Situations of the Republic of Kazakhstan, Almaty, Kazakhstan
National Scientific Center for Seismological Observations LLP and research Ministry of Emergency Situations of the Republic of Kazakhstan
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