S. Rasskazov, E. Chebykin, A. Ilyasova, S. V. Snopkov, S. Bornyakov, I. Chuvashova
{"title":"南贝加尔湖盆地完整12年地震地球动力学周期中地震危险度的变化:水同位素(234U/238U)监测结果","authors":"S. Rasskazov, E. Chebykin, A. Ilyasova, S. V. Snopkov, S. Bornyakov, I. Chuvashova","doi":"10.26516/2541-9641.2022.2.7","DOIUrl":null,"url":null,"abstract":"In the western part of the South Baikal Basin, spatial-temporal distribution of earthquake epicenters is characterized by quasi-periodic seismic reactivations. The strongest earthquakes occurred in 1999 (South Baikal, Мw = 6.0), 2008 (Kultuk, Мw = 6.3) and 2020 (Kudara, Мw = 5.4). Since 2013, we have been monitoring the 234U/238U activity ratio (AR4/8) in groundwater as an indicator of crack open/closing that promotes/prevents water circulation in active faults of the basin. From monitoring results, we define the concept of a complete seismogeodynamic cycle as a change from crustal compression to extension occurred during 12 years with a successive increase in seismic hazard levels.","PeriodicalId":44327,"journal":{"name":"Italian Journal of Engineering Geology and Environment","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Change of seismic hazard levels in complete 12-year seismogeodynamic cycle of the South Baikal Basin: results of hydroisotopic (234U/238U) monitoring\",\"authors\":\"S. Rasskazov, E. Chebykin, A. Ilyasova, S. V. Snopkov, S. Bornyakov, I. Chuvashova\",\"doi\":\"10.26516/2541-9641.2022.2.7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In the western part of the South Baikal Basin, spatial-temporal distribution of earthquake epicenters is characterized by quasi-periodic seismic reactivations. The strongest earthquakes occurred in 1999 (South Baikal, Мw = 6.0), 2008 (Kultuk, Мw = 6.3) and 2020 (Kudara, Мw = 5.4). Since 2013, we have been monitoring the 234U/238U activity ratio (AR4/8) in groundwater as an indicator of crack open/closing that promotes/prevents water circulation in active faults of the basin. From monitoring results, we define the concept of a complete seismogeodynamic cycle as a change from crustal compression to extension occurred during 12 years with a successive increase in seismic hazard levels.\",\"PeriodicalId\":44327,\"journal\":{\"name\":\"Italian Journal of Engineering Geology and Environment\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.8000,\"publicationDate\":\"2022-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Italian Journal of Engineering Geology and Environment\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.26516/2541-9641.2022.2.7\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Italian Journal of Engineering Geology and Environment","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.26516/2541-9641.2022.2.7","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Change of seismic hazard levels in complete 12-year seismogeodynamic cycle of the South Baikal Basin: results of hydroisotopic (234U/238U) monitoring
In the western part of the South Baikal Basin, spatial-temporal distribution of earthquake epicenters is characterized by quasi-periodic seismic reactivations. The strongest earthquakes occurred in 1999 (South Baikal, Мw = 6.0), 2008 (Kultuk, Мw = 6.3) and 2020 (Kudara, Мw = 5.4). Since 2013, we have been monitoring the 234U/238U activity ratio (AR4/8) in groundwater as an indicator of crack open/closing that promotes/prevents water circulation in active faults of the basin. From monitoring results, we define the concept of a complete seismogeodynamic cycle as a change from crustal compression to extension occurred during 12 years with a successive increase in seismic hazard levels.
期刊介绍：
Italian Journal of Engineering Geology and Environment (IJEGE), published by Sapienza Università Editrice university press, is the open access Journal of the Research Center CERI on "Prediction, Prevention ad Control of Geological Risks" of Sapienza University of Rome. The Journal publishes original papers concerning the numerous topics of environmental risks such as seismic risk, landslide risk, hydraulic and flood risk, groundwater resource management, soil and groundwater contamination, reclamation of contaminated land, applied geophysics, economic geology, land use, soil and rock characterization. IJEGE is the Journal of the Italian Association of Engineering Geology and Environment (AIGA). The Journal is published under the auspices of the International Association for Engineering Geology and the Environment (IAEG) - Italian Group.
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