Pub Date : 2023-09-26DOI: 10.35540/2686-7907.2023.3.04
A.M. Muraliev, F.S. Abdyldaeva, M. Seitaliev, A.V. Berezina, G.A. Sabirova
The data on the republican network of seismic stations continuously operating on the territory of Kyrgyzstan are presenting. The transition from analog to digital system of registration of seismic phenomena is considered as the next stage in the development of seismic monitoring in the republic.
{"title":"Development of seismic monitoring in Kyrgyzstan","authors":"A.M. Muraliev, F.S. Abdyldaeva, M. Seitaliev, A.V. Berezina, G.A. Sabirova","doi":"10.35540/2686-7907.2023.3.04","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.3.04","url":null,"abstract":"The data on the republican network of seismic stations continuously operating on the territory of Kyrgyzstan are presenting. The transition from analog to digital system of registration of seismic phenomena is considered as the next stage in the development of seismic monitoring in the republic.","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135720065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Information is provided on the seismicity of the Earth at the level of mb≥6.0 in the 2023 first half, as well as on 97 earthquakes felt on the territory of the Russian Federation according to the to the Alert Service of the Geophysical Survey RAS. For the 14 most severe earthquakes, information messages were publishing within one or two days after their implementation, the parameters of the mechanisms of foci were calculated and given. During the period under review, the strongest earthquakes on the globe with MS=8.0 (Mw=7.8) and MS=7.8 (Mw=7.7) occurred on February 6 in Kahramanmaras Province, Turkey. As a result of these earthquakes, 500 people were killed in Turkey, about 115 thousand were injured, about 10 thousand people were killed in Syria, and more than 10 thousand were injured. On the territory of Russia, the strongest earthquake was on April 3 with mb=6.4 (Mw=6.5) on the east coast of Kamchatka. It was also felt with the greatest intensity of concussions (5-6 points) in the settlements of Russia. The seismic energy released on the globe for the 2023 first half (1.93⋅1017 J) increased relative to similar values for the 2022 first and second half, coming close to the average half-year value for the period 2010-2022 (2.31⋅1017 J).
{"title":"Global earthquakes in the 2023 first half according to the GS RAS","authors":"Yu.A. Vinogradov, M.I. Ryzhikova, S.G. Poygina, N.V. Petrova, M.V. Kolomiets","doi":"10.35540/2686-7907.2023.3.01","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.3.01","url":null,"abstract":"Information is provided on the seismicity of the Earth at the level of mb≥6.0 in the 2023 first half, as well as on 97 earthquakes felt on the territory of the Russian Federation according to the to the Alert Service of the Geophysical Survey RAS. For the 14 most severe earthquakes, information messages were publishing within one or two days after their implementation, the parameters of the mechanisms of foci were calculated and given. During the period under review, the strongest earthquakes on the globe with MS=8.0 (Mw=7.8) and MS=7.8 (Mw=7.7) occurred on February 6 in Kahramanmaras Province, Turkey. As a result of these earthquakes, 500 people were killed in Turkey, about 115 thousand were injured, about 10 thousand people were killed in Syria, and more than 10 thousand were injured. On the territory of Russia, the strongest earthquake was on April 3 with mb=6.4 (Mw=6.5) on the east coast of Kamchatka. It was also felt with the greatest intensity of concussions (5-6 points) in the settlements of Russia. The seismic energy released on the globe for the 2023 first half (1.93⋅1017 J) increased relative to similar values for the 2022 first and second half, coming close to the average half-year value for the period 2010-2022 (2.31⋅1017 J).","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135720223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.35540/2686-7907.2023.3.03
E.E. Kosyakina, A.V. Liseikin, P.V. Gromyko, V.S. Seleznev
The relationship between temperature fluctuations and changes in natural frequencies of a piletype engineering structure located on permafrost soils is investigated in connection with the development of methods for monitoring the technical condition of similar structures. The object of the study is the Palace of Culture of the polar branch of PJSC MMC Norilsk Nickel, located in Norilsk, where in recent years the thawing of the soils has a potential threat to the stability of engineering structures. The basic values of the frequencies of natural oscillations of the building were determined in August 2021 by the method of coherent reconstruction of the fields of standing waves and are 3.0, 3.7, 4.7 Hz on the short axis and 3.5 and 5.2 Hz on the long axis. The current (daily) frequency values are determined with an error of no more than 0.01 Hz from the amplitude spectra of seismic noise recordings (without active sources), which were obtained during continuous seismic monitoring from the end of August 2021 to the beginning of September 2022. From comparing the changes in the frequencies of natural oscillations with fluctuations in ambient temperature, it follows that during the year the frequencies change significantly (in winter their values are 11–12% higher than in summer), presumably due to defrosting/ freezing of the upper part of the soil. Against the background of this change, local fluctuations in frequency values were revealed due to cooling/ heating of the material of the building mainly at a positive ambient temperature (frequencies increase in direct proportion to temperature within 5–7%). According to the analysis of monitoring data after the annual cycle, the natural frequencies of the building in August 2021 and 2022 are not equal (the difference is up to 1.7%), which is presumably explained by the different depth of ground defrosting in the summer. To assess the impact of this phenomenon on the technical condition of the building, it is necessary to continue monitoring, first of all, to obtain data on changes in the natural frequ
{"title":"Control of the technical condition of buildings and structures on permafrost soils by the changes in the frequencies of natural vibrations (according to seismic monitoring of a pile-type building – the Palace of culture of Norilsk)","authors":"E.E. Kosyakina, A.V. Liseikin, P.V. Gromyko, V.S. Seleznev","doi":"10.35540/2686-7907.2023.3.03","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.3.03","url":null,"abstract":"The relationship between temperature fluctuations and changes in natural frequencies of a piletype engineering structure located on permafrost soils is investigated in connection with the development of methods for monitoring the technical condition of similar structures. The object of the study is the Palace of Culture of the polar branch of PJSC MMC Norilsk Nickel, located in Norilsk, where in recent years the thawing of the soils has a potential threat to the stability of engineering structures. The basic values of the frequencies of natural oscillations of the building were determined in August 2021 by the method of coherent reconstruction of the fields of standing waves and are 3.0, 3.7, 4.7 Hz on the short axis and 3.5 and 5.2 Hz on the long axis. The current (daily) frequency values are determined with an error of no more than 0.01 Hz from the amplitude spectra of seismic noise recordings (without active sources), which were obtained during continuous seismic monitoring from the end of August 2021 to the beginning of September 2022. From comparing the changes in the frequencies of natural oscillations with fluctuations in ambient temperature, it follows that during the year the frequencies change significantly (in winter their values are 11–12% higher than in summer), presumably due to defrosting/ freezing of the upper part of the soil. Against the background of this change, local fluctuations in frequency values were revealed due to cooling/ heating of the material of the building mainly at a positive ambient temperature (frequencies increase in direct proportion to temperature within 5–7%). According to the analysis of monitoring data after the annual cycle, the natural frequencies of the building in August 2021 and 2022 are not equal (the difference is up to 1.7%), which is presumably explained by the different depth of ground defrosting in the summer. To assess the impact of this phenomenon on the technical condition of the building, it is necessary to continue monitoring, first of all, to obtain data on changes in the natural frequ","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135719878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Modern geodynamic systems of the Urals are studied in connection with the uneven distribution of seismic activity. The neotectonic zoning and geodynamic conditions of its formation in the Southern and Middle Urals and adjacent platform territories were studied in connection with the Katav-Ivanovo mediummagnitude earthquake occurred in 2018. The epicenter was located outside the known zones of possible seismic sources, which required additional research to determine the causes of the earthquake. As a result of near-surface and deep research the Uraltau-Magnitogorsk and Osinsko-Bolsheusinskaya geodynamic systems have been established, which are the cause of the transverse segmentation of the Urals and, possibly, one of the factors of seismic activity. The geodynamic systems are inconsistently articulated with each other with the development of the Birsko-Karatau geodynamically active zone and the Katav-Satka interference zone. The earthquake is associated with the Katav-Satka interference zone. The interference zone has been investigated with respect to fracturing and slickenlines. Orientations of modern stresses induced from the active regions are estimated. Modern stresses are the reason for the activation of the Zilmerdak from the beginning of the Late Paleozoic overstep and, as a consequence, the Katav-Ivanov earthquake. Earthquakes caused the development of secondary dangerous seismogenic phenomena and deformation of buildings.
{"title":"Modern geodynamic systems of the Urals in relation to seismicity","authors":"V.M. Makeev, E.A. Pikulik, S.N. Nikitin, I.V. Korobova","doi":"10.35540/2686-7907.2023.3.06","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.3.06","url":null,"abstract":"Modern geodynamic systems of the Urals are studied in connection with the uneven distribution of seismic activity. The neotectonic zoning and geodynamic conditions of its formation in the Southern and Middle Urals and adjacent platform territories were studied in connection with the Katav-Ivanovo mediummagnitude earthquake occurred in 2018. The epicenter was located outside the known zones of possible seismic sources, which required additional research to determine the causes of the earthquake. As a result of near-surface and deep research the Uraltau-Magnitogorsk and Osinsko-Bolsheusinskaya geodynamic systems have been established, which are the cause of the transverse segmentation of the Urals and, possibly, one of the factors of seismic activity. The geodynamic systems are inconsistently articulated with each other with the development of the Birsko-Karatau geodynamically active zone and the Katav-Satka interference zone. The earthquake is associated with the Katav-Satka interference zone. The interference zone has been investigated with respect to fracturing and slickenlines. Orientations of modern stresses induced from the active regions are estimated. Modern stresses are the reason for the activation of the Zilmerdak from the beginning of the Late Paleozoic overstep and, as a consequence, the Katav-Ivanov earthquake. Earthquakes caused the development of secondary dangerous seismogenic phenomena and deformation of buildings.","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135720220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-26DOI: 10.35540/2686-7907.2023.3.05
K.Yu. Silkin
The article summarizes the results of research on the application of the fingerprint method in seismology. This method can be successfully used in solving various practical problems. We have used it as an effective tool for a thorough analysis of noisy seismograms of regional explosions and earthquakes in order to select the optimal filtering frequency. The cut-off frequency selected with the help of fingerprints will allow you to design an optimal filter that not only reliably suppresses low-frequency noise, but also carefully preserves the signal it hides. Moreover, the method works well when the noise intensity exceeds the signal intensity many times over and under conditions of partial overlap of their frequency ranges. Fundamental is the initial orientation of the method towards automatic implementation with minimal use of additional information. In conclusion, this article proposes to use a neural network expert system that allows you to evaluate the quality of the fingerprint algorithm. To create such a system, we needed to explore current trends in seismology regarding the use of artificial neural networks. Based on extensive worldwide experience, it has been shown that there is a clear renewed interest in the use of small, lowcost networks. The principle on which they are based lies in their perception as training and input data of compact, complexly structured parameters of a high degree of transformation of primary seismograms. It is these parameters that include the characteristics taken from fingerprints using the algorithms we propose. So our experience in creating a neural network expert system naturally turned out to be successful. The reliability of the estimates obtained turned out to be very close to the practical limit of the fingerprint method.
{"title":"A neural network expert system that allows assessing the quality of the algorithm for choosing the parameters of optimal removal of low-frequency noise from seismograms using the fingerprint method","authors":"K.Yu. Silkin","doi":"10.35540/2686-7907.2023.3.05","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.3.05","url":null,"abstract":"The article summarizes the results of research on the application of the fingerprint method in seismology. This method can be successfully used in solving various practical problems. We have used it as an effective tool for a thorough analysis of noisy seismograms of regional explosions and earthquakes in order to select the optimal filtering frequency. The cut-off frequency selected with the help of fingerprints will allow you to design an optimal filter that not only reliably suppresses low-frequency noise, but also carefully preserves the signal it hides. Moreover, the method works well when the noise intensity exceeds the signal intensity many times over and under conditions of partial overlap of their frequency ranges. Fundamental is the initial orientation of the method towards automatic implementation with minimal use of additional information. In conclusion, this article proposes to use a neural network expert system that allows you to evaluate the quality of the fingerprint algorithm. To create such a system, we needed to explore current trends in seismology regarding the use of artificial neural networks. Based on extensive worldwide experience, it has been shown that there is a clear renewed interest in the use of small, lowcost networks. The principle on which they are based lies in their perception as training and input data of compact, complexly structured parameters of a high degree of transformation of primary seismograms. It is these parameters that include the characteristics taken from fingerprints using the algorithms we propose. So our experience in creating a neural network expert system naturally turned out to be successful. The reliability of the estimates obtained turned out to be very close to the practical limit of the fingerprint method.","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135719879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The results of a consistent and versatile study of the seismotectonics of source zones of strong modern earthquakes in the Caucasus under the guidance and with the participation of E.A. Rogozhin. The sources of all strong modern earthquakes have been studied from a unified methodological standpoint. The collected data on the tectonic position of seismic sources make it possible to draw certain conclusions that are of practical interest in order to seismic hazard assessment.
{"title":"Seismotectonics of sources of strong earthquakes in the Caucasus: Results of studies by Evgeny Alexandrovich Rogozhin","authors":"A.N. Ovsyuchenko, A.S. Larkov, N.V. Andreeva, R.N. Lukashova","doi":"10.35540/2686-7907.2023.3.02","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.3.02","url":null,"abstract":"The results of a consistent and versatile study of the seismotectonics of source zones of strong modern earthquakes in the Caucasus under the guidance and with the participation of E.A. Rogozhin. The sources of all strong modern earthquakes have been studied from a unified methodological standpoint. The collected data on the tectonic position of seismic sources make it possible to draw certain conclusions that are of practical interest in order to seismic hazard assessment.","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135720224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-25DOI: 10.33876/2782-5000/2023-5-1/7-14
Герасимова
{"title":"К 85-ЛЕТИЮ СО ДНЯ РОЖДЕНИЯ ТЕЛЬМАНА КАСИМОВИЧА ХОДЖАЙОВА","authors":"Герасимова","doi":"10.33876/2782-5000/2023-5-1/7-14","DOIUrl":"https://doi.org/10.33876/2782-5000/2023-5-1/7-14","url":null,"abstract":"","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76322594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Information is provided on the seismicity of the Earth at the level of mb≥6.0 in the 2022 second half, as well as on 66 earthquakes felt on the territory of the Russian Federation according to the to the Alert Service of the Geophysical Survey RAS. For the 15 most severe earthquakes, information messages were published within one or two days after their implementation, the parameters of the mechanisms of foci were calculated and given. During the period under review, the strongest earthquake on the globe with MS=7.8 (Mw=7.7) occurred on September 19 in the state of Michoacan, Mexico. The greatest human casualties and material damage were caused by a catastrophic earthquake with MS=5.3 (Mw=5.6), which occurred on November 21 on the island of Java, Indonesia. Because of the earthquake, 318 people were killing and more than 7,700 people were injured. On the territory of Russia, the strongest earthquake was on September 20 with MS=6.0 (Mw=6.1) in the area of the Commander Islands. The earthquake of December 8 with mb=5.6 (Mw=5.5), which occurred on the territory of the Republic of Dagestan, was felt with the greatest intensity of concussions (6 points) in the settlements of Russia. The seismic energy released on the globe for the 2022 second half (9.1⋅1016 J) increased after its minimum over the past 13 years (2010–2022), observed in the 2022 first half (2.76⋅1016 J), however, remained below the average value for 2010–2022 (2.31⋅1017 J).
{"title":"Global earthquakes in the 2022 second half according to the GS RAS","authors":"Yu.A. Vinogradov, M.I. Ryzhikova, N.V. Petrova, S.G. Poygina, M.V. Kolomiets","doi":"10.35540/2686-7907.2023.1.01","DOIUrl":"https://doi.org/10.35540/2686-7907.2023.1.01","url":null,"abstract":"Information is provided on the seismicity of the Earth at the level of mb≥6.0 in the 2022 second half, as well as on 66 earthquakes felt on the territory of the Russian Federation according to the to the Alert Service of the Geophysical Survey RAS. For the 15 most severe earthquakes, information messages were published within one or two days after their implementation, the parameters of the mechanisms of foci were calculated and given. During the period under review, the strongest earthquake on the globe with MS=7.8 (Mw=7.7) occurred on September 19 in the state of Michoacan, Mexico. The greatest human casualties and material damage were caused by a catastrophic earthquake with MS=5.3 (Mw=5.6), which occurred on November 21 on the island of Java, Indonesia. Because of the earthquake, 318 people were killing and more than 7,700 people were injured. On the territory of Russia, the strongest earthquake was on September 20 with MS=6.0 (Mw=6.1) in the area of the Commander Islands. The earthquake of December 8 with mb=5.6 (Mw=5.5), which occurred on the territory of the Republic of Dagestan, was felt with the greatest intensity of concussions (6 points) in the settlements of Russia. The seismic energy released on the globe for the 2022 second half (9.1⋅1016 J) increased after its minimum over the past 13 years (2010–2022), observed in the 2022 first half (2.76⋅1016 J), however, remained below the average value for 2010–2022 (2.31⋅1017 J).","PeriodicalId":52612,"journal":{"name":"Rossiiskii seismologicheskii zhurnal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136339633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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