Seismic Instruments最新文献_第4页

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

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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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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

Preliminary Estimates of the Characteristics of Radiation and Propagation of Seismic Waves and the Ground Motion Prediction Equations for the Ural Region 乌拉尔地区地震波辐射和传播特性的初步估计及地震动预报方程

IF 0.9

Seismic Instruments Pub Date : 2023-01-10 DOI: 10.3103/S0747923922060123

V. A. Pavlenko

{"title":"Preliminary Estimates of the Characteristics of Radiation and Propagation of Seismic Waves and the Ground Motion Prediction Equations for the Ural Region","authors":"V. A. Pavlenko","doi":"10.3103/S0747923922060123","DOIUrl":"10.3103/S0747923922060123","url":null,"abstract":"This paper reports the first estimates of the characteristics of radiation and propagation of seismic waves in the Ural region obtained by modeling the accelerograms of recorded local earthquakes. The obtained source parameters are similar to those of the Caucasian region, while the seismic wave propagation characteristics are similar to those of the Baikal rift zone. A somewhat increased duration of strong motion in the Ural region can obviously be explained by a fractured structure of the Ural Mountains. The ground motion prediction equations (GMPEs) proposed by the Global Earthquake Model (GEM) project for the Ural region correspond to the platform regions with a stable continental seismicity, while the obtained characteristics of radiation and propagation of seismic waves in the Ural region correspond to the seismically active regions with a crustal seismicity. The comparison of the amplitudes of acceleration response spectra of the strongest earthquake recorded in the region with the estimates obtained by using the GMPEs has revealed a considerable excess of the estimates over the observed spectral amplitudes. Hence, the recommendations of the GEM should not be used in their original form, without correction factors, and it is necessary to develop the regional GMPEs for the purposes of seismic hazard analysis.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4419038","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 Reply to R.A. Dyagilev’s Comment on “New Opportunities for Epicentral Seismic Observations” by N.K. Kapustian, E.V. Shakhova, and G.N. Antonovskaya N.K. Kapustian, E.V. Shakhova和G.N. Antonovskaya对R.A. Dyagilev关于“震中地震观测的新机遇”的评论的答复

IF 0.9

Seismic Instruments Pub Date : 2023-01-10 DOI: 10.3103/S074792392206007X

N. K. Kapustian, E. V. Shakhova, G. N. Antonovskaya

引用次数: 0

A Comment on “New Opportunities for Epicentral Seismic Observations” by N.K. Kapustian, E.V. Shakhova, and G.N. Antonovskaya 评N.K. Kapustian, E.V. Shakhova和G.N. Antonovskaya的“震中地震观测的新机遇”

IF 0.9

Seismic Instruments Pub Date : 2023-01-10 DOI: 10.3103/S0747923922060032

R. A. Dyagilev

引用次数: 0

Strong Earthquakes in the Northern Baikal Region in 2016–2017 (МW = 5.0 and МW = 4.8) 2016-2017年北贝加尔湖地区强震(МW = 5.0， МW = 4.8)

IF 0.9

Seismic Instruments Pub Date : 2023-01-10 DOI: 10.3103/S074792392206010X

V. I. Melnikova, N. A. Gileva, A. I. Filippova, Ya. B. Radziminovich

{"title":"Strong Earthquakes in the Northern Baikal Region in 2016–2017 (МW = 5.0 and МW = 4.8)","authors":"V. I. Melnikova, N. A. Gileva, A. I. Filippova, Ya. B. Radziminovich","doi":"10.3103/S074792392206010X","DOIUrl":"10.3103/S074792392206010X","url":null,"abstract":"This paper presents the results of a detailed study of two relatively strong seismic events, occurred on November, 22, 2016 (МW = 5.0) and April 3, 2017 (МW = 4.8) at the northeastern flank of the Baikal rift zone in the areas of the South Muya and Kalar ranges. Both the events were followed by weak aftershocks (N = 178–539, Кр ≤ 11.0), whose epicenters were densely distributed over an area. The seismic moment tensors and hypocentral depths of the mainshocks were calculated from surface wave amplitude spectra. It has been shown that their sources were formed under the influence of the subhorizontal SE–NW extension and the subhorizontal or inclined NE–SW compression. Both the earthquakes were followed by noticeable macroseismic effects at epicentral distances up to 500 km. In the area of the Baikal−Amur Railway, their shaking intensity was IV–V MSK-64. The results obtained can be used in continuous seismic monitoring at the northeastern flank of the Baikal rift zone and can contribute to an objective seismic hazard assessment of the study area.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4419625","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