{"title":"S-WAVES ATTENUATION FIELD IN THE NEAR REGION OF NPP SITES ACCORDING TO SEISMIC MONITORING DATA (ON THE EXAMPLE OF THE AKKUYU NPP, TURKEY)","authors":"","doi":"10.21455/gr2019.2-5","DOIUrl":"https://doi.org/10.21455/gr2019.2-5","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47250475","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}
{"title":"INFLUENCE OF THE INTERPLANETARY MAGNETIC FIELD ORIENTATION ON NORTH-SOUTHERN ASYMMETRY OF ULF WAVE PACKETS IN THE POLAR CAPS","authors":"","doi":"10.21455/gr2019.2-2","DOIUrl":"https://doi.org/10.21455/gr2019.2-2","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43537922","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}
{"title":"INVESTIGATION OF LITHOSPHERIC MAGNETIC ANOMALIES OF THE GREENLAND-ICELAND-FAROE RIDGE COMPLEX ON MEASUREMENTS OF THE CHAMP SATELLITE","authors":"","doi":"10.21455/gr2019.2-1","DOIUrl":"https://doi.org/10.21455/gr2019.2-1","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44484393","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}
{"title":"COMPARISON OF MODERN GLOBAL ULTRA-HIGH-GRADE MODELS OF THE EARTH GRAVITATIONAL FIELD","authors":"","doi":"10.21455/gr2019.1-2","DOIUrl":"https://doi.org/10.21455/gr2019.1-2","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44659657","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}
{"title":"AUTOMATIC DETECTION AND CLASSIFICATION ALGORITHM OF INDUSTRIAL BLASTS BASED ON THE ENTROPY MAPPING OF SEISMIC SIGNALS","authors":"","doi":"10.21455/gr2019.1-4","DOIUrl":"https://doi.org/10.21455/gr2019.1-4","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":"140 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41299516","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}
{"title":"THE EARTH CRUST STRUCTURE OF THE LESSER CAUCASUS FROM DEEP SEISMIC SOUNDING DATA","authors":"","doi":"10.21455/gr2019.1-6","DOIUrl":"https://doi.org/10.21455/gr2019.1-6","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49323132","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}
Исследование рассматривает актуальный вопрос повышения точности картирования трещины гидроразрыва пласта (ГРП) с использованием микросейсмического мониторинга. Данный вопрос актуален прежде всего в связи с возрастающим объемом ГРП при разработке современных залежей УВ. В этой связи необходима выработка методических рекомендаций к проведению полевых работ с целью получения наиболее информативных результатов. Авторы статьи использовали полноволновое трехмерное моделирование сейсмической эмиссии от точечного источника, симулирующего излучение энергии в процессе развития трещины ГРП. Для регистрации возникающих упругих колебаний смоделированы несколько систем наблюдения поверхностного и скважинного типа, наиболее распространенных на данный момент на практике. Моделирование единичного источника позволило получить характерные сейсмограммы для разных систем наблюдения. Анализ результатов при различных условиях приема, дает возможность рассмотреть характерные волновые поля и проанализировать основные достоинства и недостатки разных систем наблюдения. На модельных результатах показано, что максимальная информативность достигается поверхностной патч-системой, которая обеспечивает широкую апертуру наблюдения и более высокий уровень сигнала на фоне помех.
{"title":"MODERN APPROACHES TO NUMERICAL MODELING OF MICROSEISMIC EVENTS","authors":"A. Butorin, F. Krasnov","doi":"10.21455/gr2019.2-4","DOIUrl":"https://doi.org/10.21455/gr2019.2-4","url":null,"abstract":"Исследование рассматривает актуальный вопрос повышения точности картирования трещины гидроразрыва пласта (ГРП) с использованием микросейсмического мониторинга. Данный вопрос актуален прежде всего в связи с возрастающим объемом ГРП при разработке современных залежей УВ. В этой связи необходима выработка методических рекомендаций к проведению полевых работ с целью получения наиболее информативных результатов. Авторы статьи использовали полноволновое трехмерное моделирование сейсмической эмиссии от точечного источника, симулирующего излучение энергии в процессе развития трещины ГРП. Для регистрации возникающих упругих колебаний смоделированы несколько систем наблюдения поверхностного и скважинного типа, наиболее распространенных на данный момент на практике. Моделирование единичного источника позволило получить характерные сейсмограммы для разных систем наблюдения. Анализ результатов при различных условиях приема, дает возможность рассмотреть характерные волновые поля и проанализировать основные достоинства и недостатки разных систем наблюдения. На модельных результатах показано, что максимальная информативность достигается поверхностной патч-системой, которая обеспечивает широкую апертуру наблюдения и более высокий уровень сигнала на фоне помех.","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48125191","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}
{"title":"THE LOWER IONOSPHERE CONDITIONS DURING STRONG SEISMIC ACTIVITY IN NEPAL IN 2015 ANALYZED USING THE VLF/LF NETWORK","authors":"","doi":"10.21455/gr2019.1-3","DOIUrl":"https://doi.org/10.21455/gr2019.1-3","url":null,"abstract":"","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48494525","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}
P. Kaznacheev, Z.Yu, Ya. Maibuk, A. Ponomarev, V. Smirnov, N. B. Bondarenko
Authors examine the problem of estimation of b-value for energy distribution of thermal acoustic emission (TAE) events on basis of amplitude distribution of TAE impulses. Impulses are registered by single TAE sensor. Authors have analyzed the effect of factors, associated with elastic waves propagation, on the energy of impulses. The analysis shows, that effect of elastic waves absorption in heated sample is the most significant from these factors. Two events of energy distribution are considered – with one and two sub-functions. It has shown, that the same b-value of registered impulse amplitude distribution and initial event distribution is observed if only b-value is stable in all TAE-event energy range (one sub-function). In this situation, there is one characteristic generation mechanism of events in all sample volume. But if b-value is not stable in different energy ranges (two sub-functions), then elastic waves absorption in the sample distorts initial distribution. Authors propose technique of “true” b-value estimation on basis of distribution analysis of registered TAE impulses in several amplitude subranges.
{"title":"ON THE ISSUE OF ANALYSIS OF ACOUSTIC EMISSION EVENT STATISTIC ON DATA OF SINGLE SENSOR IN ROCK THERMAL FRACTURE EXPERIMENTS","authors":"P. Kaznacheev, Z.Yu, Ya. Maibuk, A. Ponomarev, V. Smirnov, N. B. Bondarenko","doi":"10.21455/gr2019.1-5","DOIUrl":"https://doi.org/10.21455/gr2019.1-5","url":null,"abstract":"Authors examine the problem of estimation of b-value for energy distribution of thermal acoustic emission (TAE) events on basis of amplitude distribution of TAE impulses. Impulses are registered by single TAE sensor. Authors have analyzed the effect of factors, associated with elastic waves propagation, on the energy of impulses. The analysis shows, that effect of elastic waves absorption in heated sample is the most significant from these factors. Two events of energy distribution are considered – with one and two sub-functions. It has shown, that the same b-value of registered impulse amplitude distribution and initial event distribution is observed if only b-value is stable in all TAE-event energy range (one sub-function). In this situation, there is one characteristic generation mechanism of events in all sample volume. But if b-value is not stable in different energy ranges (two sub-functions), then elastic waves absorption in the sample distorts initial distribution. Authors propose technique of “true” b-value estimation on basis of distribution analysis of registered TAE impulses in several amplitude subranges.","PeriodicalId":36772,"journal":{"name":"Geophysical Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68270524","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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