Seismic Instruments最新文献_第7页

Optimal Configuration of the Karelian Seismological Network 卡累利阿地震台网的优化配置

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070039

V. Yu. Burmin

{"title":"Optimal Configuration of the Karelian Seismological Network","authors":"V. Yu. Burmin","doi":"10.3103/S0747923922070039","DOIUrl":"10.3103/S0747923922070039","url":null,"abstract":"The modern seismological network of Karelia consists of four seismic stations. The number of network stations is small, and they are unevenly distributed over the territory of Karelia. Therefore, this seismological network is not efficient enough, and seismic events (earthquakes and quarry blasts) with different minimum magnitudes and different accuracies are recorded at different points in the territory. In order for events occurring at different points of Karelia to be recorded with the same accuracy and the same minimum magnitude, it is necessary to arrange the system’s seismic stations more evenly throughout the territory; i.e., the observing system must have the optimal configuration. Calculation of the minimum magnitudes of recorded seismic events for the optimal seismological network from 65 new and 4 currently functioning seismic stations shows that with an amplification in recording channels of 50 000, the network will reliably record earthquakes with a magnitude of 1.0 or more throughout Karelia. At the same time, the position of the seismic stations of such a network in Karelia is determined up to a parallel shift and arbitrary rotation of the entire observation system. Errors in determining the epicentral coordinates in latitude and longitude within the network will not exceed 0.5 km. The errors in determining the depths of earthquake sources recorded by the system throughout Karelia do not exceed 1.0 km at the center of the network and can reach 2.0 km only on its periphery.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 1","pages":"S89 - S98"},"PeriodicalIF":0.9,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4797932","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}

引用次数: 0

A New Integrated Downhole Tool for Primary Logging in the Open Hole of Wells in Infiltration-Type Uranium Deposits 一种用于渗透型铀矿床裸眼初次测井的新型综合井下工具

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070143

A. V. Legavko, D. A. Legavko

{"title":"A New Integrated Downhole Tool for Primary Logging in the Open Hole of Wells in Infiltration-Type Uranium Deposits","authors":"A. V. Legavko, D. A. Legavko","doi":"10.3103/S0747923922070143","DOIUrl":"10.3103/S0747923922070143","url":null,"abstract":"The article shows the relevance of integrating the main open hole logging methods for wells constructed during exploration and development of infiltration type uranium deposits. The article describes a new integrated downhole tool developed by the authors for simultaneous gamma, electrical, and directional logging. The downhole tool is based on a modular scheme; includes standard, modernized, and new functional logging units; and effectively combines analog, pulse, and digital output data formats. The modular architecture of the downhole tool allows open hole logging both individually, with separate methods and modules, and simultaneously in one common assembly. The results of field tests of the new tool at one of Russia’s infiltration deposits in the Trans-Ural uranium-ore district are presented, convincingly demonstrating the high accuracy of measurements and full compliance of the obtained logging data with regulatory instructions. Use of a new complex tool during geophysical surveys in the open holes of wells constructed during prospecting for, exploration, and development of uranium and ore deposits will increase the efficiency of logging operations, lower their cost, and reduce the forced downtime of drilling crews.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 1","pages":"S187 - S194"},"PeriodicalIF":0.9,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4797875","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}

引用次数: 0

Paleoseismological Investigations in the Chikoy Fault Zone (Southern Transbaikalia) 奇科伊断裂带(南外贝加尔)古地震学研究

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070106

O. P. Smekalin, A. Yu. Eskin

{"title":"Paleoseismological Investigations in the Chikoy Fault Zone (Southern Transbaikalia)","authors":"O. P. Smekalin, A. Yu. Eskin","doi":"10.3103/S0747923922070106","DOIUrl":"10.3103/S0747923922070106","url":null,"abstract":"Active faults in Southern Transbaikalia, some of which are elements of the Mongolian–Okhotsk lineament, are still poorly studied seismically. The Chikoy fault has been characterized by weak earthquakes over a 100-year period of instrumental observations, which yields no knowledge of the seismic potential of the fault. However, distinct manifestation of a fault scarp in the modern relief suggests high rates of tectonic movements along it. This is also confirmed by the seismotectonic deformations discovered during our field studies. Field works in the Chikoy fault zone revealed signs of a seismogenic feature of the fault in segments with a total length of at least 32 km. Analysis of the morphology of the scarps and sections indicates that the dislocations were formed as a result of at least two to three paleoearthquakes with magnitudes of 7.0–7.2. According to absolute (radiocarbon) and relative (based on the slope of the scarps) dating data, the age of paleoearthquakes range from 5–8 ka, 2373–2832 years ago, and later than 760 years ago. The high seismic potential of the fault revealed by seismogeological data is confirmed by historical evidence of an earthquake with M = 6.0 that occurred here in 1830.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 1","pages":"S107 - S122"},"PeriodicalIF":0.9,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5096281","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}

引用次数: 0

Assessment of the Impact of Vibration Loads on Soil Masses and Structures 振动荷载对土体和结构影响的评价

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S074792392207012X

V. V. Kapustin, M. L. Vladov, E. A. Voznesensky, V. A. Volkov

引用次数: 0

Observations of Earth Surface Deformations at the FSUE Radon Test Site FSUE氡试验场地表变形观测

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070167

F. V. Perederin, K. I. Kholodkov, V. N. Tatarinov, R. V. Shevchuk, A. I. Manevich

引用次数: 0

Mapping Heterogeneities of the Short-Period S-Wave Attenuation Field in the Lithosphere of Southwest Alaska 阿拉斯加西南部岩石圈短周期s波衰减场的非均质性填图

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070064

Yu. F. Kopnichev, I. N. Sokolova

{"title":"Mapping Heterogeneities of the Short-Period S-Wave Attenuation Field in the Lithosphere of Southwest Alaska","authors":"Yu. F. Kopnichev, I. N. Sokolova","doi":"10.3103/S0747923922070064","DOIUrl":"10.3103/S0747923922070064","url":null,"abstract":"The authors have studied the characteristics of the short-period S-wave attenuation field in the lithosphere of southwest Alaska (in the Alaska subduction zone). Records of seismic station KDAK, obtained for shallow earthquakes within the distance range of ~250–750 km, were processed. We used a method that analyzes the ratio of maximum amplitudes in Sn and Pn waves (parameter Sn/Pn). The correlation dependence of this parameter on distance for wave lines crossing rupture zones of three large and great earthquakes is plotted: the Great Alaskan earthquake of March 28, 1964 (MW = 9.2), the Simeonov earthquake of July 22, 2020 (MW = 7.8), and Chignik earthquake of July 29, 2021 (MW = 8.2). It was established that this dependence goes a little higher than similar dependences obtained earlier for regions of southwest Japan and central Chile, and much higher than for the region of northeast Japan. The reasons for the substantial differences of these dependences in different regions are discussed. The authors consider heterogeneities of the attenuation field in the rupture zones of the Simeonov earthquake and its largest aftershock (MW = 7.6), as well as of the Chignik earthquake.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 1","pages":"S99 - S106"},"PeriodicalIF":0.9,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4797943","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}

引用次数: 0

Analysis of the Values of Ground Displacements, Shear Strains, Velocities, Accelerations, and Response Spectra of a Strong Earthquake Based on Synthetic Accelerograms 基于合成加速度图的强震地表位移、剪切应变、速度、加速度和反应谱分析

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070131

E. Y. Khachiyan

{"title":"Analysis of the Values of Ground Displacements, Shear Strains, Velocities, Accelerations, and Response Spectra of a Strong Earthquake Based on Synthetic Accelerograms","authors":"E. Y. Khachiyan","doi":"10.3103/S0747923922070131","DOIUrl":"10.3103/S0747923922070131","url":null,"abstract":"In his early works, the author developed a mechanical–mathematical method for modeling synthetic seismograms and accelerograms of strong earthquakes for a given site with certain ground conditions, whereby an earthquake is viewed as an effect of instantaneous rupturing of Earth’s crust. This study examines ground displacements, velocities, accelerations, and relative shear strains, as well as earthquake response spectra based on synthetic accelerograms. All ground categories are reviewed, from the hardest rocks to the most unconsolidated soils. The maximum values for ground displacements, velocities, and accelerations are obtained as a function of the attenuation coefficient of rocks and the number of oscillation modes of the considered foundation bedding, as well as peak ground accelerations as a function of distance from the expected earthquake’s rupture. It is shown that higher oscillation modes increase ground acceleration 1.66 times if calculated using only the first oscillation mode; they also increase ground displacements 1.1 times, while decreasing shear strain 1.1 times. The maximum positive attenuation effect in hard ground compared to its absence reaches 37%. Shear strain values increase proportionally to an increase in soil category number. At a level of 15 m from Earth’s surface in rocky soils, at a magnitude of М = 7.0, the shear strain values exceed the critical thresholds, which implies a high probability of surface rupturing. Response spectra obtained by synthetic accelerograms are compared to similar spectra based on a large number of actual earthquakes, showing that they are quite similar both qualitatively and quantitatively. Based on the results, it is recommended to use them for assessing seismic hazard levels in various areas, monitoring for earthquake prediction, ensuring seismic safety of facilities and underground structures, and enhancing analysis methods of seismic impact on buildings and structures.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 1","pages":"S161 - S176"},"PeriodicalIF":0.9,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4799635","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}

引用次数: 0

Seismic Impact of Bulk Blasts during Underground Mining of the Korobkovsky Iron Ore Deposit on Buildings and Population of the City of Gubkin 科罗弗科夫斯基铁矿地下开采过程中大块爆破对古布金市建筑物和人口的地震影响

IF 0.9

Seismic Instruments Pub Date : 2023-03-20 DOI: 10.3103/S0747923922070076

V. I. Kulikov, Z. Z. Sharafiev

引用次数: 0

Some Methods for Determining Seismic Effects on Structures According to Different Building Regulations and Possibility of Creating Single Method 根据不同建筑规范确定结构地震效应的几种方法及建立单一方法的可能性

IF 0.9

Seismic Instruments Pub Date : 2023-01-10 DOI: 10.3103/S0747923922060020

R. A. Atabekyan, S. N. Nazaretyan

{"title":"Some Methods for Determining Seismic Effects on Structures According to Different Building Regulations and Possibility of Creating Single Method","authors":"R. A. Atabekyan, S. N. Nazaretyan","doi":"10.3103/S0747923922060020","DOIUrl":"10.3103/S0747923922060020","url":null,"abstract":"A brief analysis of different regulations for determining seismic loads based on the spectral theory shows that they have much in common but, at the same time, contain numerous amendments and clarifications for assessing true seismic effects. The calculation of seismic loads for one and the same conditions according to the regulations used in different countries produces significantly different results. According to the authors, there is a real possibility of creating common international regulations by refining and supplementing the existing ones. Apparently, the most promising regulations are European Standards EN 1998-2004/2012. The principle of calculation according to EN is more natural because seismic actions are actually transmitted to structures through a foundation. In addition, this approach allows consideration of a number of factors that affect the degree of seismic effects (ultimate shear resistance of soils, pressure on foundation soils, foundation−soil contact area, seismic beam tilt, etc.). An attempt is also made to assess the factors that impede the acceleration of building foundations during strong earthquakes.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 6","pages":"663 - 675"},"PeriodicalIF":0.9,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4421038","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}

引用次数: 0

New Tools for Rapid Assessment of Felt Reports and a Case Study on Sakhalin Island 快速评估感觉报告的新工具和库页岛案例研究

IF 0.9

Seismic Instruments Pub Date : 2023-01-10 DOI: 10.3103/S0747923922060081

A. V. Konovalov, A. A. Stepnov, E. S. Bogdanov, R. Yu. Dmitrienko, I. D. Orlin, A. S. Sychev, A. V. Gavrilov, K. A. Manaychev, A. T. Tsoy, Yu. A. Stepnova

引用次数: 1