GNSS Seismogeodesy

GNSS Seismogeodesy
Author: Jianghui Geng
Publsiher: Elsevier
Total Pages: 320
Release: 2020-12-15
ISBN 10: 9780128164860
ISBN 13: 0128164867
Language: EN, FR, DE, ES & NL

GNSS Seismogeodesy Book Review:

GNSS Seismogeodesy: Theory and Applications combines GNSS and seismology theory and applications to offer both disciplines the background information needed to combine forces. It explores the opportunities for integrating GNSS and seismometers, as well as applications for earthquake and tsunami early warning applications. It allows seismologists to better understand how GNSS positions are computed and how they can be combined with seismic data and allows geodesists to better understand how to apply GNSS to monitoring of crustal motion. GNSS Seismogeodesy is a valuable reference for researchers and students studying the interdisciplinary connection between GNSS geodesy and strong-motion seismology, as well as working on new approaches for monitoring and predicting geologic hazards. Bridges the gap for geodesists and seismologists to better understand how their fields can be complementary Offers an interdisciplinary approach to GNSS geodesy and strong-motion seismology, showing how high-precision GNSS positions can be combined with seismic data Covers the applications of seismogeodesy to earthquake early warning (EEW) and tsunami early warning (TEW) Includes algorithms and source code examples, as well as links to open source software and data sets

Seismogeodetic Methods for Earthquake and Tsunami Warning and Response

Seismogeodetic Methods for Earthquake and Tsunami Warning and Response
Author: Dara Elyse Goldberg
Publsiher: Anonim
Total Pages: 227
Release: 2018
ISBN 10:
ISBN 13: OCLC:1079908932
Language: EN, FR, DE, ES & NL

Seismogeodetic Methods for Earthquake and Tsunami Warning and Response Book Review:

This dissertation presents a series of algorithms and plans for implementation of a prototype earthquake early warning system by merging two seismic observation tools: strong motion accelerometers and Global Navigation Satellite Systems (GNSS). The seismogeodetic approach, that which optimally merges these disparate data types, allows a reliable estimation of the earthquake source for early warning procedures from event detection to magnitude estimation and higher order products. We address implementation of this system in a real-time, automated environment, designed to operate without manual oversight. We assess the capabilities of low-cost micro-electro-mechanical systems (MEMS) accelerometers merged with observatory-grade GNSS for seismic P-wave detection, and suggest statistical methods to determine whether P-wave detections are consistent between stations, which allows for the automated removal of poor quality detections to avoid propagating these errors to higher order warning products. In line with these goals, we demonstrate how seismogeodetic observations contribute to our view of initial rupture dynamics of large earthquakes. We address an open question in seismology regarding the deterministic nature of earthquakes, assessing how early it is possible to fully characterize the source parameters of large, damaging earthquakes. Our seismogeodetic observations suggest that final earthquake magnitude is not discernable from the first few seconds of observation and therefore the earthquake rupture process is not strongly deterministic. We further investigate the complete temporal evolution of seismic moment release to identify the earliest magnitude-dependent features in our observational dataset. We create synthetic rupture models to identify the physical basis responsible for the timing of observed magnitude-dependent qualities. Our findings suggest that earthquake magnitude can be estimated prior to rupture completion, consistent with a weakly deterministic rupture process. These results provide new insights into the best practices for early warning and rapid response, and suggest limitations on the timeliness of earthquake source characterization. Finally, we turn to the built environment to demonstrate the applicability of these multi-instrument sensors to long-term structural health and seismic monitoring, to bolster earthquake and other natural hazard response practices. We describe efforts to characterize local buildings by creating a baseline model for the healthy structure and propose methods by which structural health can be evaluated over time or following a major seismic event to assess building safety without the need for manual inspection. We again assess the capabilities of low-cost MEMS accelerometers and describe the limitations of this lower-quality instrumentation for structural monitoring applications.

China Satellite Navigation Conference CSNC 2017 Proceedings

China Satellite Navigation Conference  CSNC  2017 Proceedings
Author: Jiadong Sun,Jingnan Liu,Yuanxi Yang,Shiwei Fan,Wenxian Yu
Publsiher: Springer
Total Pages: 647
Release: 2017-05-02
ISBN 10: 9811045917
ISBN 13: 9789811045912
Language: EN, FR, DE, ES & NL

China Satellite Navigation Conference CSNC 2017 Proceedings Book Review:

These proceedings present selected research papers from CSNC2017, held during 23th-25th May in Shanghai, China. The theme of CSNC2017 is Positioning, Connecting All. These papers discuss the technologies and applications of the Global Navigation Satellite System (GNSS), and the latest progress made in the China BeiDou System (BDS) especially. They are divided into 12 topics to match the corresponding sessions in CSNC2017, which broadly covered key topics in GNSS. Readers can learn about the BDS and keep abreast of the latest advances in GNSS techniques and applications.

International Symposium on Geodesy for Earthquake and Natural Hazards GENAH

International Symposium on Geodesy for Earthquake and Natural Hazards  GENAH
Author: Manabu Hashimoto
Publsiher: Springer
Total Pages: 168
Release: 2016-12-09
ISBN 10: 3319397680
ISBN 13: 9783319397689
Language: EN, FR, DE, ES & NL

International Symposium on Geodesy for Earthquake and Natural Hazards GENAH Book Review:

These proceedings contain a selection of peer-reviewed papers presented at the International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH), Matsushima, Japan, 22-26 July, 2014. The scientific sessions focused on monitoring temporal and spatial changes in Earth's lithosphere and atmosphere using geodetic satellite systems, high rate GNSS as well as high resolution imaging (InSAR, Lidar). Researchers in various fields of geodesy discussed the role of geodesy in disaster mitigation and how groups with different techniques can collaborate toward such a goal.

China Satellite Navigation Conference CSNC 2014 Proceedings

China Satellite Navigation Conference  CSNC  2014 Proceedings
Author: Jiadong Sun,Wenhai Jiao,Haitao Wu,Mingquan Lu
Publsiher: Springer Science & Business
Total Pages: 499
Release: 2014-04-25
ISBN 10: 3642547435
ISBN 13: 9783642547430
Language: EN, FR, DE, ES & NL

China Satellite Navigation Conference CSNC 2014 Proceedings Book Review:

China Satellite Navigation Conference (CSNC) 2014 Proceedings presents selected research papers from CSNC2014, held on 21-23 May in Nanjing, China. The theme of CSNC2014 is 'BDS Application: Innovation, Integration and Sharing'. These papers discuss the technologies and applications of the Global Navigation Satellite System (GNSS) and the latest progress made in the China BeiDou System (BDS) especially. They are divided into 9 topics to match the corresponding sessions in CSNC2014, which broadly covered key topics in GNSS. Readers can learn about the BDS and keep abreast of the latest advances in GNSS techniques and applications. SUN Jiadong is the Chief Designer of the Compass/ BDS and the Academician of Chinese Academy of Sciences (CAS); JIAO Wenhai is a researcher at China Satellite Navigation Office; WU Haitao is a professor at Navigation Headquarters, CAS; LU Mingquan is a professor at Department of Electronic Engineering of Tsinghua University.

Earth Observations for Geohazards

Earth Observations for Geohazards
Author: Zhenhong Li,Roberto Tomás
Publsiher: MDPI
Total Pages: 500
Release: 2018-07-05
ISBN 10: 3038424005
ISBN 13: 9783038424000
Language: EN, FR, DE, ES & NL

Earth Observations for Geohazards Book Review:

This book is a printed edition of the Special Issue "Earth Observations for Geohazards" that was published in Remote Sensing

Early Warning for Geological Disasters

Early Warning for Geological Disasters
Author: Friedemann Wenzel,Jochen Zschau
Publsiher: Springer Science & Business Media
Total Pages: 379
Release: 2013-08-13
ISBN 10: 3642122337
ISBN 13: 9783642122330
Language: EN, FR, DE, ES & NL

Early Warning for Geological Disasters Book Review:

The past years have seen new technologies that could be utilized for early warning and real-time loss estimation. They include self-organizing sensor networks, new satellite imagery with high resolution, multi-sensor observational capacities, and crowd sourcing. From this and improved physical models, data processing and communication methodologies a significant step towards better early warning technologies has been achieved by research. At the same time, early warning systems became part of the disaster management practice for instance in Japan and Indonesia. This book marks the important point where: Research activities continue to improve early warning Experience with applications is expanding At this critical point in development of early warning for geological disasters it is timely to provide a volume that documents the state-of-the-art, provides an overview on recent developments and serves as knowledge resource for researcher and practitioners.

Routine Data Processing in Earthquake Seismology

Routine Data Processing in Earthquake Seismology
Author: Jens Havskov,Lars Ottemoller
Publsiher: Springer Science & Business Media
Total Pages: 347
Release: 2010-06-16
ISBN 10: 9048186978
ISBN 13: 9789048186976
Language: EN, FR, DE, ES & NL

Routine Data Processing in Earthquake Seismology Book Review:

The purpose of this book is to get a practical understanding of the most common processing techniques in earthquake seismology. The book deals with manual methods and computer assisted methods. Each topic will be introduced with the basic theory followed by practical examples and exercises. There are manual exercises entirely based on the printed material of the book, as well as computer exercises based on public domain software. Most exercises are computer based. The software used, as well as all test data are available from http://extras.springer.com. This book is intended for everyone processing earthquake data, both in the observatory routine and in connection with research. Using the exercises, the book can also be used as a basis for university courses in earthquake processing. Since the main emphasis is on processing, the theory will only be dealt with to the extent needed to understand the processing steps, however references will be given to where more extensive explanations can be found. Includes: • Exercises • Test data • Public domain software (SEISAN) available from http://extras.springer.com

Volcano Deformation

Volcano Deformation
Author: Daniel Dzurisin
Publsiher: Springer Science & Business Media
Total Pages: 442
Release: 2006-11-24
ISBN 10: 3540493026
ISBN 13: 9783540493020
Language: EN, FR, DE, ES & NL

Volcano Deformation Book Review:

Volcanoes and eruptions are dramatic surface man telemetry and processing, and volcano-deformation ifestations of dynamic processes within the Earth, source models over the past three decades. There has mostly but not exclusively localized along the been a virtual explosion of volcano-geodesy studies boundaries of Earth's relentlessly shifting tectonic and in the modeling and interpretation of ground plates. Anyone who has witnessed volcanic activity deformation data. Nonetheless, other than selective, has to be impressed by the variety and complexity of brief summaries in journal articles and general visible eruptive phenomena. Equally complex, works on volcano-monitoring and hazards mitiga however, if not even more so, are the geophysical, tion (e. g. , UNESCO, 1972; Agnew, 1986; Scarpa geochemical, and hydrothermal processes that occur and Tilling, 1996), a modern, comprehensive treat underground - commonly undetectable by the ment of volcano geodesy and its applications was human senses - before, during, and after eruptions. non-existent, until now. Experience at volcanoes worldwide has shown that, In the mid-1990s, when Daniel Dzurisin (DZ to at volcanoes with adequate instrumental monitor friends and colleagues) was serving as the Scientist ing, nearly all eruptions are preceded and accom in-Charge of the USGS Cascades Volcano Observa panied by measurable changes in the physical and tory (CVO), I first learned of his dream to write a (or) chemical state of the volcanic system. While book on volcano geodesy.

Springer Handbook of Global Navigation Satellite Systems

Springer Handbook of Global Navigation Satellite Systems
Author: Peter Teunissen,Oliver Montenbruck
Publsiher: Springer
Total Pages: 1327
Release: 2017-06-16
ISBN 10: 3319429280
ISBN 13: 9783319429281
Language: EN, FR, DE, ES & NL

Springer Handbook of Global Navigation Satellite Systems Book Review:

This Handbook presents a complete and rigorous overview of the fundamentals, methods and applications of the multidisciplinary field of Global Navigation Satellite Systems (GNSS), providing an exhaustive, one-stop reference work and a state-of-the-art description of GNSS as a key technology for science and society at large. All global and regional satellite navigation systems, both those currently in operation and those under development (GPS, GLONASS, Galileo, BeiDou, QZSS, IRNSS/NAVIC, SBAS), are examined in detail. The functional principles of receivers and antennas, as well as the advanced algorithms and models for GNSS parameter estimation, are rigorously discussed. The book covers the broad and diverse range of land, marine, air and space applications, from everyday GNSS to high-precision scientific applications and provides detailed descriptions of the most widely used GNSS format standards, covering receiver formats as well as IGS product and meta-data formats. The full coverage of the field of GNSS is presented in seven parts, from its fundamentals, through the treatment of global and regional navigation satellite systems, of receivers and antennas, and of algorithms and models, up to the broad and diverse range of applications in the areas of positioning and navigation, surveying, geodesy and geodynamics, and remote sensing and timing. Each chapter is written by international experts and amply illustrated with figures and photographs, making the book an invaluable resource for scientists, engineers, students and institutions alike.

GPS Satellite Surveying

GPS Satellite Surveying
Author: Alfred Leick,Lev Rapoport,Dmitry Tatarnikov
Publsiher: John Wiley & Sons
Total Pages: 840
Release: 2015-04-02
ISBN 10: 1119018269
ISBN 13: 9781119018261
Language: EN, FR, DE, ES & NL

GPS Satellite Surveying Book Review:

Employ the latest satellite positioning tech with this extensiveguide GPS Satellite Surveying is the classic text on thesubject, providing the most comprehensive coverage of globalnavigation satellite systems applications for surveying. Fullyupdated and expanded to reflect the field's latest developments,this new edition contains new information on GNSS antennas, PrecisePoint Positioning, Real-time Relative Positioning, LatticeReduction, and much more. New contributors offer additional insightthat greatly expands the book's reach, providing readers withcomplete, in-depth coverage of geodetic surveying using satellitetechnologies. The newest, most cutting-edge tools, technologies,and applications are explored in-depth to help readers stay up todate on best practices and preferred methods, giving them theunderstanding they need to consistently produce more reliablemeasurement. Global navigation satellite systems have an array of uses inmilitary, civilian, and commercial applications. In surveying, GNSSreceivers are used to position survey markers, buildings, and roadconstruction as accurately as possible with less room for humanerror. GPS Satellite Surveying provides complete guidancetoward the practical aspects of the field, helping readers to: Get up to speed on the latest GPS/GNSS developments Understand how satellite technology is applied tosurveying Examine in-depth information on adjustments and geodesy Learn the fundamentals of positioning, lattice adjustment,antennas, and more The surveying field has seen quite an evolution of technology inthe decade since the last edition's publication. This new editioncovers it all, bringing the reader deep inside the latest tools andtechniques being used on the job. Surveyors, engineers, geologists,and anyone looking to employ satellite positioning will find GPSSatellite Surveying to be of significant assistance.

Principles and Applications of Microearthquake Networks

Principles and Applications of Microearthquake Networks
Author: William Hung Kan Lee,S. W. Stewart
Publsiher: Academic Press
Total Pages: 293
Release: 1981-01-01
ISBN 10: 0120188627
ISBN 13: 9780120188628
Language: EN, FR, DE, ES & NL

Principles and Applications of Microearthquake Networks Book Review:

The Geodynamics of the Aegean and Anatolia

The Geodynamics of the Aegean and Anatolia
Author: Tuncay Taymaz,Yücel Yilmaz,Yildirim Dilek
Publsiher: Geological Society of London
Total Pages: 314
Release: 2007
ISBN 10: 9781862392397
ISBN 13: 1862392390
Language: EN, FR, DE, ES & NL

The Geodynamics of the Aegean and Anatolia Book Review:

This book contains current results and ideas regarding the geodynamics of the Aegean and Anatolia.

GALILEO Positioning Technology

GALILEO Positioning Technology
Author: Jari Nurmi,Elena Simona Lohan,Stephan Sand,Heikki Hurskainen
Publsiher: Springer
Total Pages: 402
Release: 2014-09-12
ISBN 10: 9400718306
ISBN 13: 9789400718302
Language: EN, FR, DE, ES & NL

GALILEO Positioning Technology Book Review:

This book covers multi-band Galileo receivers (especially E1-E5 bands of Galileo) and addresses all receiver building blocks, from the antenna and front end, through details of the baseband receiver processing blocks, up to the navigation processing, including the Galileo message structure and Position, Velocity, Time (PVT) computation. Moreover, hybridization solutions with communications systems for improved localization are discussed and an open-source GNSS receiver platform (available for download) developed at Tampere University of Technology (TUT) is addressed in detail.

Encyclopedia of Solid Earth Geophysics

Encyclopedia of Solid Earth Geophysics
Author: Harsh Gupta
Publsiher: Springer Science & Business Media
Total Pages: 1539
Release: 2011-06-29
ISBN 10: 904818701X
ISBN 13: 9789048187010
Language: EN, FR, DE, ES & NL

Encyclopedia of Solid Earth Geophysics Book Review:

The past few decades have witnessed the growth of the Earth Sciences in the pursuit of knowledge and understanding of the planet that we live on. This development addresses the challenging endeavor to enrich human lives with the bounties of Nature as well as to preserve the planet for the generations to come. Solid Earth Geophysics aspires to define and quantify the internal structure and processes of the Earth in terms of the principles of physics and forms the intrinsic framework, which other allied disciplines utilize for more specific investigations. The first edition of the Encyclopedia of Solid Earth Geophysics was published in 1989 by Van Nostrand Reinhold publishing company. More than two decades later, this new volume, edited by Prof. Harsh K. Gupta, represents a thoroughly revised and expanded reference work. It brings together more than 200 articles covering established and new concepts of Geophysics across the various sub-disciplines such as Gravity, Geodesy, Geomagnetism, Seismology, Seismics, Deep Earth Processes, Plate Tectonics, Thermal Domains, Computational Methods, etc. in a systematic and consistent format and standard. It is an authoritative and current reference source with extraordinary width of scope. It draws its unique strength from the expert contributions of editors and authors across the globe. It is designed to serve as a valuable and cherished source of information for current and future generations of professionals.

VII Hotine Marussi Symposium on Mathematical Geodesy

VII Hotine Marussi Symposium on Mathematical Geodesy
Author: Nico Sneeuw,Pavel Novák,Mattia Crespi,Fernando Sansò
Publsiher: Springer Science & Business Media
Total Pages: 407
Release: 2012-02-02
ISBN 10: 3642220789
ISBN 13: 9783642220784
Language: EN, FR, DE, ES & NL

VII Hotine Marussi Symposium on Mathematical Geodesy Book Review:

The Hotine-Marussi Symposium is the core meeting of a “think thank”, a group scientists in the geodetic environment working on theoretical and methodological subjects, while maintaining the foundations of geodesy to the proper level by corresponding to the strong advancements improved by technological development in the field of ICT, electronic computing, space technology, new measurement devices etc. The proceedings of the symposium cover a broad area of arguments which integrate the foundations of geodesy as a science. The common feature of the papers therefore is not on the object, but rather in the high mathematical standards with which subjects are treated.

Global Geodetic Observing System

Global Geodetic Observing System
Author: Hans-Peter Plag,Michael Pearlman
Publsiher: Springer Science & Business Media
Total Pages: 332
Release: 2009-07-25
ISBN 10: 3642026877
ISBN 13: 9783642026874
Language: EN, FR, DE, ES & NL

Global Geodetic Observing System Book Review:

The Global Geodetic Observing System (GGOS) has been established by the Int- national Association of Geodesy (IAG) in order to integrate the three fundamental areas of geodesy, so as to monitor geodetic parameters and their temporal varia- ?9 tions, in a global reference frame with a target relative accuracy of 10 or b- ter. These areas, often called ‘pillars’, deal with the determination and evolution of (a) the Earth’s geometry (topography, bathymetry, ice surface, sea level), (b) the Earth’s rotation and orientation (polar motion, rotation rate, nutation, etc. ), and (c) the Earth’s gravity eld (gravity, geoid). Therefore, Earth Observation on a global scale is at the heart of GGOS’s activities, which contributes to Global Change - search through the monitoring, as well as the modeling, of dynamic Earth processes such as, for example, mass and angular momentum exchanges, mass transport and ocean circulation, and changes in sea, land and ice surfaces. To achieve such an - bitious goal, GGOS relies on an integrated network of current and future terrestrial, airborne and satellite systems and technologies. These include: various positioning, navigation, remote sensing and dedicated gravity and altimetry satellite missions; global ground networks of VLBI, SLR, DORIS, GNSS and absolute and relative gravity stations; and airborne gravity, mapping and remote sensing systems.

The Concise Encyclopedia of Statistics

The Concise Encyclopedia of Statistics
Author: Yadolah Dodge
Publsiher: Springer Science & Business Media
Total Pages: 622
Release: 2008-04-15
ISBN 10: 0387317422
ISBN 13: 9780387317427
Language: EN, FR, DE, ES & NL

The Concise Encyclopedia of Statistics Book Review:

The Concise Encyclopedia of Statistics presents the essential information about statistical tests, concepts, and analytical methods in language that is accessible to practitioners and students of the vast community using statistics in medicine, engineering, physical science, life science, social science, and business/economics. The reference is alphabetically arranged to provide quick access to the fundamental tools of statistical methodology and biographies of famous statisticians. The more than 500 entries include definitions, history, mathematical details, limitations, examples, references, and further readings. All entries include cross-references as well as the key citations. The back matter includes a timeline of statistical inventions. This reference will be an enduring resource for locating convenient overviews about this essential field of study.

Hilbert Huang Transform and Its Applications

Hilbert   Huang Transform and Its Applications
Author: Norden E Huang,Samuel S P Shen
Publsiher: World Scientific
Total Pages: 400
Release: 2014-04-22
ISBN 10: 981450825X
ISBN 13: 9789814508254
Language: EN, FR, DE, ES & NL

Hilbert Huang Transform and Its Applications Book Review:

This book is written for scientists and engineers who use HHT (Hilbert–Huang Transform) to analyze data from nonlinear and non-stationary processes. It can be treated as a HHT user manual and a source of reference for HHT applications. The book contains the basic principle and method of HHT and various application examples, ranging from the correction of satellite orbit drifting to detection of failure of highway bridges. The thirteen chapters of the first edition are based on the presentations made at a mini-symposium at the Society for Industrial and Applied Mathematics in 2003. Some outstanding mathematical research problems regarding HHT development are discussed in the first three chapters. The three new chapters of the second edition reflect the latest HHT development, including ensemble empirical mode decomposition (EEMD) and modified EMD. The book also provides a platform for researchers to develop the HHT method further and to identify more applications. Contents:Introduction to the Hilbert–Huang Transform and Its Related Mathematical ProblemsEnsemble Empirical Mode Decomposition and Its Multi-Dimensional ExtensionsMultivariate Extensions of Empirical Mode DecompositionB-Spline Based Empirical Mode DecompositionEMD Equivalent Filter Banks, From Interpretation to ApplicationsHHT Sifting and FilteringStatistical Significance Test of Intrinsic Mode FunctionsThe Time-Dependent Intrinsic CorrelationThe Application of Hilbert–Huang Transforms to Meteorological DatasetsEmpirical Mode Decomposition and Climate VariabilityEMD Correction of Orbital Drift Artifacts in Satellite Data StreamHHT Analysis of the Nonlinear and Non-Stationary Annual Cycle of Daily Surface Air Temperature DataHilbert Spectra of Nonlinear Ocean WavesEMD and Instantaneous Phase Detection of Structural DamageHTT-Based Bridge Structural Health-Monitoring MethodApplications of HHT in Image Analysis Readership: Applied mathematicians, climate scientists, highway engineers, medical scientists, geologists, civil engineers, mechanical engineers, electrical engineers, economics and graduate students in science or engineering. Keywords:Hilbert–Huang Transform;Empirical Mode Decomposition;Intrinsic Mode Function;Hilbert Spectral Analysis;Time-Frequency AnalysisKey Features:A tool book for analyzing nonlinear and non-stationary dataA source book for HHT development and applicationsThe most complete reference for HHT method and applications

The Seismogenic Zone of Subduction Thrust Faults

The Seismogenic Zone of Subduction Thrust Faults
Author: Timothy Dixon, PH D,Timothy H. Dixon,J. Casey Moore
Publsiher: Columbia University Press
Total Pages: 680
Release: 2007
ISBN 10: 9780231138666
ISBN 13: 0231138660
Language: EN, FR, DE, ES & NL

The Seismogenic Zone of Subduction Thrust Faults Book Review:

Subduction zones, one of the three types of plate boundaries, return Earth's surface to its deep interior. Because subduction zones are gently inclined at shallow depths and depress Earth's temperature gradient, they have the largest seismogenic area of any plate boundary. Consequently, subduction zones generate Earth's largest earthquakes and most destructive tsunamis. As tragically demonstrated by the Sumatra earthquake and tsunami of December 2004, these events often impact densely populated coastal areas and cause large numbers of fatalities. While scientists have a general understanding of the seismogenic zone, many critical details remain obscure. This volume attempts to answer such fundamental concerns as why some interplate subduction earthquakes are relatively modest in rupture length (greater than 100 km) while others, such as the great (M greater than 9) 1960 Chile, 1964 Alaska, and 2004 Sumatra events, rupture along 1000 km or more. Contributors also address why certain subduction zones are fully locked, accumulating elastic strain at essentially the full plate convergence rate, while others appear to be only partially coupled or even freely slipping; whether these locking patterns persist through the seismic cycle; and what is the role of sediments and fluids on the incoming plate. Nineteen papers written by experts in a variety of fields review the most current lab, field, and theoretical research on the origins and mechanics of subduction zone earthquakes and suggest further areas of exploration. They consider the composition of incoming plates, laboratory studies concerning sediment evolution during subduction and fault frictional properties, seismic and geodetic studies, and regional scale deformation. The forces behind subduction zone earthquakes are of increasing environmental and societal importance.