An Automated Approach For The Determination Of The Seismic Moment Tensor In Mining Environments

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An Automated Approach for the Determination of the Seismic Moment Tensor in Mining Environments

Author : Lawrence R. Wamboldt
Publisher :
ISBN 13 :
Total Pages : 374 pages
Book Rating : 4.:/5 (814 download)

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Book Synopsis An Automated Approach for the Determination of the Seismic Moment Tensor in Mining Environments by : Lawrence R. Wamboldt

Download or read book An Automated Approach for the Determination of the Seismic Moment Tensor in Mining Environments written by Lawrence R. Wamboldt and published by . This book was released on 2012 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was undertaken to evaluate an automated process to invert for seismic moment tensors from seismic data recorded in mining environments. The data for this study was recorded at Nickel Rim South mine, Sudbury, Ontario. The mine has a seismic monitoring system manufactured by ESG Solutions that performs continuous monitoring of seismicity. On average, approximately 400 seismic events are recorded each day. Currently, data are automatically processed by ESG Solution's software suite during acquisition. The automatic processors pick the P- and/or S-wave arrivals, locate the events and solve for certain source parameters, excluding the seismic moment tensor. In order to solve for the moment tensor, data must be manually processed, which is laborious and therefore seldom performed. This research evaluates an automatic seismic moment tensor inversion method and demonstrates some of the difficulties (through inversions of real and synthetic seismic data) of the inversion process. Results using the method are also compared to the inversion method currently available from ESG Solutions, which requires the manual picking of first-motion polarities for every event. As a result of the extensive synthetic testing of the automatic inversion program, as well as the inversion of real seismic data, it is apparent that there are key parameters requiring greater accuracy in order to increase the reliability of the automation. These parameters include the source time function definition, source location (in turn requiring more accurate and precise knowledge of the earth media), arrival time picks and an attenuation model to account for ray-path dependent filtering of the source time function. In order to improve the automatic method three key pieces of research are needed: (1) studying various location algorithms (and the effects of increasing earth model intricacy) and automatic time picking to improve source location methods, (2) studying how the source time pulse can be accurately extracted from the seismic records, as well as the validity of various source models, and (3) studying how attenuation can be modeled more accurately to account for the filtering of the seismic waves through the earth media (in particular distortion to the source time function).

Development of Automated Moment Tensor Software at the Prototype International Data Center

Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (713 download)

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Book Synopsis Development of Automated Moment Tensor Software at the Prototype International Data Center by :

Download or read book Development of Automated Moment Tensor Software at the Prototype International Data Center written by and published by . This book was released on 2000 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are porting automatic seismic moment tensor software used by the Berkeley Seismological Laboratory to the Prototype International Data Center (PIDC). This software package utilizes a surface wave spectral amplitude and phase method coupled with a three-component waveform inverse method that is scaleable from teleseismic to regional distances. The objective is to initially develop automatic software for the analysis of Mw5.5 and greater events on a global scale utilizing the International Monitoring System (IMS). For regions of specific interest we will utilize crustal structure calibration information from other DTRA projects to refine capabilities to Mw4.5 and greater. Currently version 0.1 is ported to the PIDC, and several examples of its use are presented. During the course of this project a staged testing program will be employed to refine the software and to provide robust code suitable for operations at the PIDC.

Determination of the Seismic Moment Tensor Using Surface Waves Recorded by the IMS Network

Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (61 download)

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Book Synopsis Determination of the Seismic Moment Tensor Using Surface Waves Recorded by the IMS Network by :

Download or read book Determination of the Seismic Moment Tensor Using Surface Waves Recorded by the IMS Network written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Provisional Technical Secretariat (PTS) of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) has been ramping-up the installation of the International Monitoring System (IMS) consisting of a network of seismic, hydroacoustic, infrasound, and radionuclide stations, since its inception in March 1997. Data from this network are automatically processed at the International Data Centre (IDC) to produce, within a few hours, a series of automatic bulletins called the Standard Event Lists (SEL1, SEL2, SEL3). After analyst review and correction as necessary the Reviewed Event Bulletin (REB) is produced. Additional information about characterization of an event as an earthquake or otherwise is also available in the Standard Event Bulletin (SEB) shortly after production of the REB. The Comprehensive Nuclear-Test-Ban Treaty (CTBT) states that the IDC will apply standard event screening criteria to each event formed. The objective of this process is to filter out events that are considered to be consistent with natural or non-nuclear man-made phenomena, leaving a reduced set of events that may require further examination. In Annex 2 of the Protocol to the Treaty, the focal mechanism is listed as possible event screening parameters. In order to provide a focal mechanism and increase the number of elements potentially useful as screening attributes, we have in the last two years implemented two methods for moment tensor (MT) inversion. One method is based on the P body waves and the other on surface waves. Implementation of these sophisticated inversion methods has led to improvements in the calibration of the broad-band seismic network, notably quality control of the instrument responses. We report here on the results obtained from the implementation of the surface-wave MT inversion, which uses both Rayleigh waves and Love waves.

Moment Tensor Solutions

Author : Sebastiano D'Amico
Publisher : Springer
ISBN 13 : 9783319773582
Total Pages : 0 pages
Book Rating : 4.7/5 (735 download)

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Book Synopsis Moment Tensor Solutions by : Sebastiano D'Amico

Download or read book Moment Tensor Solutions written by Sebastiano D'Amico and published by Springer. This book was released on 2018-05-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book first focuses on the explanation of the theory about focal mechanisms and moment tensor solutions and their role in the modern seismology. The second part of the book compiles several state-of-the-art case studies in different seismotectonic settings of the planet.The assessment of seismic hazard and the reduction of losses due to future earthquakes is probably the most important contribution of seismology to society. In this regard, the understanding of reliable determination seismic source and of its uncertainty can play a key role in contributing to geodynamic investigation, seismic hazard assessment and earthquake studies. In the last two decades, the use of waveforms recorded at local-to-regional distances has increased considerably. Waveform modeling has been used also to estimate faulting parameters of small-to-moderate sized earthquakes.

Advances in Geophysics

Author :
Publisher : Academic Press
ISBN 13 : 0080957005
Total Pages : 192 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Advances in Geophysics by :

Download or read book Advances in Geophysics written by and published by Academic Press. This book was released on 2009-11-19 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The critically acclaimed serialized review journal for over 50 years, Advances in Geophysics is a highly respected publication in the field of geophysics. Since 1952, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now in its 51st volume, it contains much material still relevant today--truly an essential publication for researchers in all fields of geophysics.

Advances in Monitoring, Modeling and Managing Induced Seismicity

Author : Francesco Grigoli
Publisher : Frontiers Media SA
ISBN 13 : 2889744337
Total Pages : 173 pages
Book Rating : 4.8/5 (897 download)

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Book Synopsis Advances in Monitoring, Modeling and Managing Induced Seismicity by : Francesco Grigoli

Download or read book Advances in Monitoring, Modeling and Managing Induced Seismicity written by Francesco Grigoli and published by Frontiers Media SA. This book was released on 2022-02-18 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Inversion of Seismic Source Parameters for Weak Mining-induced and Natural Earthquakes

Author : Ali Tolga S̜en
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (935 download)

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Book Synopsis Inversion of Seismic Source Parameters for Weak Mining-induced and Natural Earthquakes by : Ali Tolga S̜en

Download or read book Inversion of Seismic Source Parameters for Weak Mining-induced and Natural Earthquakes written by Ali Tolga S̜en and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this thesis is to develop an automated inversion scheme to derive point and finite source parameters for weak earthquakes, here intended with the unusual meaning of earthquakes with magnitudes at the limit or below the bottom magnitude threshold of standard source inversion routines. The adopted inversion approaches entirely rely on existing inversion software, the methodological work mostly targeting the development and tuning of optimized inversion flows. The resulting inversion scheme is tested for very different datasets, and thus allows the discussion on the source inversion problem at different scales. In the first application, dealing with mining induced seismicity, the source parameters determination is addressed at a local scale, with source-sensor distance of less than 3 km. In this context, weak seismicity corresponds to event below magnitude MW 2.0, which are rarely target of automated source inversion routines. The second application considers a regional dataset, namely the aftershock sequence of the 2010 Maule earthquake (Chile), using broadband stations at regional distances, below 300 km. In this case, the magnitude range of the target aftershocks range down to MW 4.0. This dataset is here considered as a weak seismicity case, since the analysis of such moderate seismicity is generally investigated only by moment tensor inversion routines, with no attempt to resolve source duration or finite source parameters. In this work, automated multi-step inversion schemes are applied to both datasets with the aim of resolving point source parameters, both using double couple (DC) and full moment tensor (MT) models, source duration and finite source parameters. A major result of the analysis of weaker events is the increased size of resulting moment tensor catalogues, which interpretation may become not trivial. For this reason, a novel focal mechanism clustering approach is used to automatically classify focal mechanisms, allowing the investigation of the most relevant and repetitive rupture features. The inversion of the mining induced seismicity dataset reveals the repetitive occurrence of similar rupture processes, where the source geometry is controlled by the shape of the mined panel. Moreover, moment tensor solutions indicate a significant contribution of tensile processes. Also the second application highlights some characteristic geometrical features of the fault planes, which show a general consistency with the orientation of the slab. The additional inversion for source duration allowed to verify the empirical correlation for moment normalized earthquakes in subduction zones among a decreasing rupture duration with increasing source depth, which was so far only observed for larger events.

Seismic Moment Tensor Report for the 06 Aug 2007, M3.9 Seismic Event in Central Utah

Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Seismic Moment Tensor Report for the 06 Aug 2007, M3.9 Seismic Event in Central Utah by :

Download or read book Seismic Moment Tensor Report for the 06 Aug 2007, M3.9 Seismic Event in Central Utah written by and published by . This book was released on 2007 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have performed a complete moment tensor analysis (Minson and Dreger, 2007) of the seismic event, which occurred on Monday August 6, 2007 at 08:48:40 UTC, 21 km from Mount Pleasant, Utah. The purpose of this report is to present our scientific results, making them available to other researchers working on seismic source determination problems, and source type identification. In our analysis we used complete, three-component seismic records recorded by stations operated by the USGS, the University of Utah and EarthScope. The results of our analysis show that most of the seismic wave energy is consistent with an underground collapse, however the cause of the mine collapse is still unknown.

Spectral Analysis and Moment Tensor Inversion of Seismic Events Induced in Polish Coal Mines: Search for Non-Shearing Components

Author :
Publisher :
ISBN 13 :
Total Pages : 230 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Spectral Analysis and Moment Tensor Inversion of Seismic Events Induced in Polish Coal Mines: Search for Non-Shearing Components by :

Download or read book Spectral Analysis and Moment Tensor Inversion of Seismic Events Induced in Polish Coal Mines: Search for Non-Shearing Components written by and published by . This book was released on 1994 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigations conducted under this contract are focused on a research for non-shearing components of the source mechanism of seismic events induced in Polish coal mines. Such seismic events are expected to occur in close vicinity to the mining faces, where favorable conditions for generation of tensile failures or shear failures with tensile components are present. Simultaneous application of spectral analysis of seismic waves and moment tensor inversion was used to study this problem. The ratio of P-wave to S-wave energy radiated from mine tremors is in many cases anomalously large, implying that non-shear failures are often generated by mining excavations. We expected to show that the high P-wave energy tremors are generated by the sources with prominent non-double-couple components, as estimated from the moment tensor solutions.

Seismic Monitoring in Mines

Author : A.J. Mendecki
Publisher : Springer Science & Business Media
ISBN 13 : 940091539X
Total Pages : 280 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Seismic Monitoring in Mines by : A.J. Mendecki

Download or read book Seismic Monitoring in Mines written by A.J. Mendecki and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Routine seismic monitoring in mines was introduced over 30 years ago with two main objectives in mind: • immediate location of larger seIsmIC events to guide rescue operations; • prediction of large rockmass instabilities. The first objective was achieved fairly quickly, but with the subsequent development of mine communication systems, its strategic importance has diminished. The very limited success with prediction can, at least partially, be attributed to three factors: • seismic monitoring systems based on analogue technology that provided noisy and, frequently, poorly calibrated data of limited dynamic range; • the non-quantitative description of a seismic event by at best its local magnitude; and • the resultant non-quantitative analysis of seismicity, frequently through parameters of some statistical distributions, with a somewhat loose but imaginative physical interpretation. The introduction of modern digital seismic systems to mines and progress in the theory and methods of quantitative seismology have enabled the implementation of realtime seismic monitoring as a management tool, quantifying rockmass response to mining and achieving the first tangible results with prediction. A seismic event, being a sudden inelastic deformation within the rockmass, can now routinely be quantified in terms of seismic moment, its tensor, and radiated seismic energy, so that the overall size of, and stress released at, the seismic source can be estimated.

GNSS Monitoring of the Terrestrial Environment

Author : Yosuke Aoki
Publisher : Elsevier
ISBN 13 : 0323955088
Total Pages : 324 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis GNSS Monitoring of the Terrestrial Environment by : Yosuke Aoki

Download or read book GNSS Monitoring of the Terrestrial Environment written by Yosuke Aoki and published by Elsevier. This book was released on 2024-08-13 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: GNSS Monitoring of the Terrestrial Environment: Earthquakes, Volcanoes, and Climate Change presents the application of GNSS technologies to natural hazards on Earth. The book details the background theory of the GNSS techniques discussed and takes the reader through applications and implementation. Tables comparing GNSS with other geodetic techniques, such as SAR, VLBI, SLR, and conventional geodetic methods such as strainmeters, tiltmeters, and leveling surveys are also included. The book concludes with a chapter bridging both parts, discussing the relationship between earthquakes, volcanism, and climate change. The book is aimed at academics, researchers, and advanced students working in the fields of remote sensing technologies or natural hazards. It is divided into two parts, with the first covering the monitoring of earthquakes, volcanoes, and applications of GNSS signals to better understand earthquakes and volcanism, while the second part covers monitoring climate change with GNSS. Provides a detailed focus on the utility of GNSS technologies for dealing with natural hazards Details theory and applications of GNSS to natural hazards, allowing readers to develop a thorough understanding on the theoretical background as well as practical applications Covers the latest developments in the field, along with future perspectives as GNSS technologies are expected to evolve

Rockbursts and Seismicity in Mines 93

Author : R.Paul Young
Publisher : Routledge
ISBN 13 : 1351418076
Total Pages : 462 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Rockbursts and Seismicity in Mines 93 by : R.Paul Young

Download or read book Rockbursts and Seismicity in Mines 93 written by R.Paul Young and published by Routledge. This book was released on 2022-05-05 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings include the latest developments in research and practice in the area of mining-induced seismicity. Three themes are explored: strong ground motion and rockburst hazard; mechanics of seismic events and stochastic methods; and monitoring of seismicity and geomechanical modelling.

Journal of the South African Institute of Mining and Metallurgy

Author : South African Institute of Mining and Metallurgy
Publisher :
ISBN 13 :
Total Pages : 600 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Journal of the South African Institute of Mining and Metallurgy by : South African Institute of Mining and Metallurgy

Download or read book Journal of the South African Institute of Mining and Metallurgy written by South African Institute of Mining and Metallurgy and published by . This book was released on 2005-07 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Introduction to Mining Seismology

Author : Slawomir Jerzy Gibowicz
Publisher : Elsevier
ISBN 13 : 0080918360
Total Pages : 410 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis An Introduction to Mining Seismology by : Slawomir Jerzy Gibowicz

Download or read book An Introduction to Mining Seismology written by Slawomir Jerzy Gibowicz and published by Elsevier. This book was released on 2013-10-22 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Introduction to Mining Seismology describes comprehensively the modern methods and techniques used to monitor and study seismicity and rockbursts in mines. Key case histories from various worldwide mining districts clearly illustrate and skillfully emphasize the practical aspects of mining seismology. This text is intended as a handbook for geophysicists and mining and rock mechanics engineers working at mines. It will also serve as an essential reference tool for seismologists working at research institutions on local seismicity not necessarily induced by mining. Presents a comprehensive description of seismicity induced by mining worldwide Provides information on optimum network planning and seismic event location procedures in deep mines Covers a broad array of topics including focal mechanism, moment tensor, and double-couple versus non-double-couple seismic events in mines Includes data on source parameters and scaling relations for seismic events in mines

Rock Mechanics: Meeting Society's Challenges and Demands, Two Volume Set

Author : Erik Eberhardt
Publisher : CRC Press
ISBN 13 : 1439856575
Total Pages : 1772 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Rock Mechanics: Meeting Society's Challenges and Demands, Two Volume Set by : Erik Eberhardt

Download or read book Rock Mechanics: Meeting Society's Challenges and Demands, Two Volume Set written by Erik Eberhardt and published by CRC Press. This book was released on 2007-05-17 with total page 1772 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ore extraction through surface and underground mining continues to involve deeper excavations in more complex rock mass conditions. Communities and infrastructure are increasingly exposed to rock slope hazards as they expand further into rugged mountainous terrains. Energy needs are accelerating the development of new hydroelectric dams and exploit

Principles of Seismology

Author : Agustín Udías Vallina
Publisher : Cambridge University Press
ISBN 13 : 1107138698
Total Pages : 573 pages
Book Rating : 4.1/5 (71 download)

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Book Synopsis Principles of Seismology by : Agustín Udías Vallina

Download or read book Principles of Seismology written by Agustín Udías Vallina and published by Cambridge University Press. This book was released on 2018 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition features a completely new chapter on digital seismic data processing, numerous examples and 100 problems.

An Introduction to Seismology, Earthquakes, and Earth Structure

Author : Seth Stein
Publisher : John Wiley & Sons
ISBN 13 : 1118687450
Total Pages : 512 pages
Book Rating : 4.1/5 (186 download)

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Book Synopsis An Introduction to Seismology, Earthquakes, and Earth Structure by : Seth Stein

Download or read book An Introduction to Seismology, Earthquakes, and Earth Structure written by Seth Stein and published by John Wiley & Sons. This book was released on 2013-05-30 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Introduction to Seismology, Earthquakes and Earth Structures is an introduction to seismology and its role in the earth sciences, and is written for advanced undergraduate and beginning graduate students. The fundamentals of seismic wave propagation are developed using a physical approach and then applied to show how refraction, reflection, and teleseismic techniques are used to study the structure and thus the composition and evolution of the earth. The book shows how seismic waves are used to study earthquakes and are integrated with other data to investigate the plate tectonic processes that cause earthquakes. Figures, examples, problems, and computer exercises teach students about seismology in a creative and intuitive manner. Necessary mathematical tools including vector and tensor analysis, matrix algebra, Fourier analysis, statistics of errors, signal processing, and data inversion are introduced with many relevant examples. The text also addresses the fundamentals of seismometry and applications of seismology to societal issues. Special attention is paid to help students visualize connections between different topics and view seismology as an integrated science. An Introduction to Seismology, Earthquakes, and Earth Structure gives an excellent overview for students of geophysics and tectonics, and provides a strong foundation for further studies in seismology. Multidisciplinary examples throughout the text - catering to students in varied disciplines (geology, mineralogy, petrology, physics, etc.). Most up to date book on the market - includes recent seismic events such as the 1999 Earthquakes in Turkey, Greece, and Taiwan). Chapter outlines - each chapter begins with an outline and a list of learning objectives to help students focus and study. Essential math review - an entire section reviews the essential math needed to understand seismology. This can be covered in class or left to students to review as needed. End of chapter problem sets - homework problems that cover the material presented in the chapter. Solutions to all odd numbered problem sets are listed in the back so that students can track their progress. Extensive References - classic references and more current references are listed at the end of each chapter. A set of instructor's resources containing downloadable versions of all the figures in the book, errata and answers to homework problems is available at: http://levee.wustl.edu/seismology/book/. Also available on this website are PowerPoint lecture slides corresponding to the first 5 chapters of the book.