Seismic Instruments最新文献_第9页

New Heuristics Based on Wavelet Analysis of a Single Sensor Record for Earthquake and Explosion Detection 基于单传感器记录小波分析的地震爆炸探测新启发式方法

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050103

K. Yu. Silkin

{"title":"New Heuristics Based on Wavelet Analysis of a Single Sensor Record for Earthquake and Explosion Detection","authors":"K. Yu. Silkin","doi":"10.3103/S0747923922050103","DOIUrl":"10.3103/S0747923922050103","url":null,"abstract":"Recognition of a seismic event by the type of its phenomenon (earthquake or explosion, and if an explosion, then a subsurface or open pit explosion) at a regional scale on its seismogram is a problem that many researchers worldwide attempt to solve. A detailed review of Russian and global publications on this topic has been produced. This review made it possible to formulate the most promising directions on which research is underway. Thus, this study, which offers another approach to creating a discriminatory feature, may be useful for improving the results of recognition of a seismic event. The proposed method is based on continuous wavelet analysis of the seismogram from a single receiver. Two additional transformations (constructing the frequency envelopes to waveletogram and their cross-correlation at a given time) sequentially translate this result into a compact frequency-time portrait of the event. This technique was tested on seismograms of several events, the nature of which is a priori known. Recognition is possible both visually (including machine vision methods) and automatically. For the first option, the key features of frequency-time portraits of events to which attention should be paid are formulated. For the second case, a method for determining the numerical characteristics measured by the obtained images is defined. It is shown that these characteristics are naturally divided into clusters that correspond to the nature of the events.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 5","pages":"552 - 566"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5172265","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: 1

Distributed Acoustic Sensing: A New Tool or a New Paradigm 分布式声学传感:一种新工具或新范式

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050085

K. V. Kislov, V. V. Gravirov

引用次数: 1

A Short-Period Vertical Seismometer and Auxiliary Equipment for Installation in Boreholes 井内安装的短周期垂直地震仪及辅助设备

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050048

I. P. Bashilov, O. A. Gerasimchuk, V. I. Sleptsov, A. Y. Eltekov

{"title":"A Short-Period Vertical Seismometer and Auxiliary Equipment for Installation in Boreholes","authors":"I. P. Bashilov, O. A. Gerasimchuk, V. I. Sleptsov, A. Y. Eltekov","doi":"10.3103/S0747923922050048","DOIUrl":"10.3103/S0747923922050048","url":null,"abstract":"A new short-period borehole seismometer TBSC6 designed and produced at the Dukhov All-Russian Scientific Research Institute on Automatics provides proportional transformation of vertical seismic velocity oscillation to electrical signal. The seismometer has been designed for installation in boreholes with an inner diamter of 145–220 mm and inclination up to 3.5°. In its technical features (frequency range 0.5–100 Hz, linearity less than 0.006%, noise level less then –10 dB of the low seismic noise model, dynamic range greater than 145 dB, temperature range –25 to 50°C), the seismometer corresponds with the best short-period borehole seismometers in the world. The features achieved make it possible to use the short-period borehole seismometer for seismological observations of both far and local seismic sources and also for seismic situation monitoring in the vicinity of hydrotechnical structures, nuclear power plants, etc.. Auxiliary equipment (locking device, installation complex set with the borehole ahead) provides seismometer installation in boreholes with an inner diameter 145–220 mm at depth down to 100 m. Borehole ahead saves borehole tube with an outer diameter of 150–250 mm.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 5","pages":"521 - 533"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5169868","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

On the Size of an Aftershock Zone of a Large Earthquake 关于大地震余震区的大小

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050073

E. Y. Khachiyan

{"title":"On the Size of an Aftershock Zone of a Large Earthquake","authors":"E. Y. Khachiyan","doi":"10.3103/S0747923922050073","DOIUrl":"10.3103/S0747923922050073","url":null,"abstract":"Aftershocks following a large earthquake are an inevitable part of the preparation and occurrence of large earthquakes. Depending on the location of the epicenter, tectonic–structural conditions of the epicentral zone, and earthquake intensity on the Earth’s surface, an aftershock cluster can cover different surface areas. Establishing the quantitative relationships between the aftershock zone and the main parameters of the earthquake (magnitude, rupture length, and slip value) can contribute to improving the model of an earthquake as a natural physical phenomenon. The extents of aftershock and deformation zones, as well as macroseismic changes on the Earth’s surface, indirectly indicate the intensity of the mainshock and the presence of portions with different degrees of weakening of rocks in the epicentral zone. This paper proposes a method to determine the area of such an aftershock zone using a deformational model of earthquake preparation and nucleation proposed earlier by the author. A new expression is obtained for determining the area of an aftershock zone depending on (i) the length of the rupture formed during the earthquake and (ii) the average slip along the rupture; expressions for the logarithmic and linear dependences of this area on the earthquake magnitude are also obtained. It is shown that the areas of the aftershock and deformation zones around an earthquake source are identical.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 5","pages":"601 - 609"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5172266","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

Regularization of the Solution of the Inverse VES Problem by the Contrast Stabilization Method: Testing the Algorithm on Model Data 用对比稳定化方法正则化VES逆问题的解:在模型数据上的算法检验

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S074792392205005X

A. A. Bobachev, A. V. Deshcherevskii, A. Ya. Sidorin

引用次数: 3

System for Automatic Recognition of Types of Sources of Regional Seismic Events 区域地震事件源类型自动识别系统

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050036

V. E. Asming, S. V. Asming, A. V. Fedorov, Z. A. Yevtyugina, Ye. N. Chigerev, E. O. Kremenetskaya

{"title":"System for Automatic Recognition of Types of Sources of Regional Seismic Events","authors":"V. E. Asming, S. V. Asming, A. V. Fedorov, Z. A. Yevtyugina, Ye. N. Chigerev, E. O. Kremenetskaya","doi":"10.3103/S0747923922050036","DOIUrl":"10.3103/S0747923922050036","url":null,"abstract":"An approach to recognizing the types of seismic event sources is proposed, based on the combination of several heterogeneous parameters of event records and information about the territory where the seismic event occurred. The following recording parameters are used: the ratio of the amplitudes of body waves, the ratio of parts of the spectra at high and low frequencies, the magnitude, and the spectral constancy parameter. Territorial information includes data on the presence of waterbodies, glaciers, mines, and simplified information on natural seismic activity. Their joint use is done with a special type of Bayesian belief network. The decisions made by the network are probabilistic in nature; the probability is understood in the Bayesian sense, i.e., as the degree of confidence in the truth of the judgment, which consists in attributing an event to one of the types (mine explosion, other explosion on land, underwater explosion, earthquake, icequake). The approach is implemented as a software system, which is included in the program for the interactive analysis of seismic event records LOS.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 5","pages":"509 - 520"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5168791","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: 2

Analysis of Sequences of Aftershocks Initiated by Underground Nuclear Tests Conducted in North Korea on September 9, 2016 and September 3, 2017 2016年9月9日和2017年9月3日朝鲜地下核试验引发余震序列分析

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050097

I. O. Kitov, I. A. Sanina

{"title":"Analysis of Sequences of Aftershocks Initiated by Underground Nuclear Tests Conducted in North Korea on September 9, 2016 and September 3, 2017","authors":"I. O. Kitov, I. A. Sanina","doi":"10.3103/S0747923922050097","DOIUrl":"10.3103/S0747923922050097","url":null,"abstract":"The article presents the results of analyzing aftershock sequences initiated by underground nuclear tests conducted in North Korea in 2016 and 2017. Waveform cross-correlation and a multimaster method applied to phase association allowed us to find and analyze 91 aftershocks and group them into clusters associated with the underground explosions on September 9, 2016 (DPRK-5) and September 3, 2017 (DPRK-6). The duration, intensity, and sporadic nature of these two sequences indicate specific mechanisms of seismic energy release, which are probably related to the interaction of the destruction zones of DPRK-5 and DPRK-6 explosions and the collapse of their cavities with the gradual advance of the collapse columns to the free surface. The aftershock activity in 2021 suggested that the collapse process was not yet completed and predicted the occurrence of new aftershocks in the near future, which could end in the collapse column reaching the free surface. These assumptions were confirmed; during the preparation of this work, a strong aftershock with a magnitude of 3.85 was recorded on February 11, 2022, which, according to preliminary estimates, indicates the beginning of the final stage of the advance of the collapse column to the surface, the probability of which is discussed in this study.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 5","pages":"567 - 580"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5173825","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

Sensor for the Concentration of Small Atmospheric Ions for Field Geophysical Observations 用于野外地球物理观测的大气小离子浓度传感器

IF 0.9

Seismic Instruments Pub Date : 2022-09-30 DOI: 10.3103/S0747923922050024

S. V. Anisimov, K. V. Aphinogenov, S. V. Galichenko, A. A. Prokhorchuk

{"title":"Sensor for the Concentration of Small Atmospheric Ions for Field Geophysical Observations","authors":"S. V. Anisimov, K. V. Aphinogenov, S. V. Galichenko, A. A. Prokhorchuk","doi":"10.3103/S0747923922050024","DOIUrl":"10.3103/S0747923922050024","url":null,"abstract":"The paper presents the results of the analytical and hardware development of a bipolar sensor for the concentration of small atmospheric ions, designed for long-term geophysical field observations. Theoretical estimates of the response function of the sensor are obtained. The dependence of the concentration of small atmospheric ions on the magnitude of the measured current of the aspiration capacitor and ion mobility spectrum is given. Numerical computations of the trajectories of small ions in an aspiration condenser of specified dimensions and geometry are performed. The probability of recording ions depending on their mobility is found. The circuit solutions and algorithms for the functioning of the hardware of the devices are described. Based on the development materials, prototypes of sensors are made. The technical characteristics and recommendations for the use of devices are given. Unlike analogues, the device is resistant to environmental influences. The sensors are tested in laboratory conditions and during the field observations of the electricity of the atmospheric boundary layer. In addition to being used as a part of a ground-based complex for geophysical observations, the developed sensor was used in an instrumental platform for balloon observations aloft. As a result of testing the devices, it was found that the functioning of the sensors is stable and the data are representative.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 5","pages":"540 - 551"},"PeriodicalIF":0.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4042450","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: 1

Natural Oscillations of a Tower-Type High-Rise Building: Modes of Horizontal, Vertical and Rotational Oscillations According to the Standing Wave Method and Verification of the Computational Model 塔式高层建筑的自然振动:基于驻波法的水平、垂直和旋转振动模式及计算模型的验证

IF 0.9

Seismic Instruments Pub Date : 2022-08-03 DOI: 10.3103/S0747923922040028

A. F. Emanov, A. M. Belostotsky, A. A. Bakh, E. A. Khoroshavin, D. S. Dmitriev, A. I. Nagibovich, A. A. Emanov, V. V. Yankaitis, N. A. Serezhnikov, A. G. Sheboltasov

{"title":"Natural Oscillations of a Tower-Type High-Rise Building: Modes of Horizontal, Vertical and Rotational Oscillations According to the Standing Wave Method and Verification of the Computational Model","authors":"A. F. Emanov, A. M. Belostotsky, A. A. Bakh, E. A. Khoroshavin, D. S. Dmitriev, A. I. Nagibovich, A. A. Emanov, V. V. Yankaitis, N. A. Serezhnikov, A. G. Sheboltasov","doi":"10.3103/S0747923922040028","DOIUrl":"10.3103/S0747923922040028","url":null,"abstract":"For a unique building in the form of a tower with a core of rigidity in the center, experimental studies of natural oscillations by the standing wave method with theoretical calculations based on a finite element model are performed and compared. From the experiment, ten translational horizontal modes of natural oscillations, five torsional modes of natural oscillations, and eight vertical modes of natural oscillations were identified and investigated. The finite element model is used to calculate the natural oscillations corresponding to all experimentally isolated oscillation modes. The experiment and theory are compared over the entire set of natural frequencies. Differences in natural frequencies reached 20%. After the studies, if possible, correction of the computational model ensured the difference between the experiment and the theory in terms of the values of natural frequencies of no more than 7.5%. Verification of design models of buildings using the standing wave method is an effective approach to assessing the physical condition of buildings and their seismic resistance.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 4","pages":"442 - 472"},"PeriodicalIF":0.9,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4110785","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

Unification of Magnitudes for Modern Earthquakes in the Eurasian Arctic Region 欧亚北极地区现代地震震级的统一

IF 0.9

Seismic Instruments Pub Date : 2022-08-03 DOI: 10.3103/S0747923922040077

A. N. Morozov, N. V. Vaganova, Ya. A. Mikhailova, I. V. Starkov

{"title":"Unification of Magnitudes for Modern Earthquakes in the Eurasian Arctic Region","authors":"A. N. Morozov, N. V. Vaganova, Ya. A. Mikhailova, I. V. Starkov","doi":"10.3103/S0747923922040077","DOIUrl":"10.3103/S0747923922040077","url":null,"abstract":"The article presents the results of identifying correlation relationships between magnitudes of different types, calculated in international and regional seismological centers. An increase in the number of seismic stations in the Arctic in the 21st century and corresponding increase in the number of recorded earthquakes (due to a decrease in the threshold recording magnitude) has made it possible to identify quantitative relationships between magnitudes based on large samplings of earthquakes and in a wide range of magnitudes. From International Seismological Center data for 1995–2020, we obtained 30 ratios between magnitudes of different types, calculated at different seismological centers, in particular, magnitudes ranging from mb and MS 2.6 and ML = 0.8. The identified relationships will make it possible to compile an aggregated unified catalog of earthquakes for certain regions of the Arctic, which is necessary, primarily, for assessing the seismic hazard of certain areas, as well as studying low-magnitude earthquakes and clusters and swarms of such quakes.","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"58 4","pages":"389 - 397"},"PeriodicalIF":0.9,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4111448","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: 3