Close to 75 million people in 39 states face some risk from earthquakes. Seismic hazards are greatest in the western United States, particularly California, Alaska, Washington, Oregon, and Hawaii. The Rocky Mountain region, a portion of the central United States known as the New Madrid Seismic Zone, and portions of the eastern seaboard, particularly South Carolina, also have a relatively high earthquake hazard. Compared to the loss of life in other countries, relatively few Americans have died as a result of earthquakes over the past 100 years. The United States, however, faces the possibility of large economic losses from earthquake damaged buildings and infrastructure.

Finalist, 2021 Balsillie Prize for Public PolicyA Globe and Mail Top 100 BookThe Big One and what we can do to get ready for it.Mention the word earthquake and most people think of California. But while the Golden State shakes on a regular basis, Washington State, Oregon, and British Columbia are located in a zone that can produce the world's biggest earthquakes and tsunamis. In the eastern part of the continent, small cities and large, from Ottawa to Montreal to New York City, sit in active earthquake zones. In fact, more than 100-million North Americans live in active seismic zones, many of whom do not realize the risk to their community.For more than a decade, Gregor Craigie interviewed scientists, engineers, and emergency planners about earthquakes, disaster response, and resilience. He has also collected vivid first-hand accounts from people who have survived deadly earthquakes. His fascinating and deeply researched book dives headfirst into explaining the science behind The Big One -- and asks what we can do now to prepare ourselves for events geologists say aren't a matter of if, but when.

With the signing in 1996 of the Comprehensive Nuclear Test Ban Treaty, interest has grown in forensic seismology: the application of seismology to nuclear test ban verification. This book, based on over 50 years of experience in forensic seismology research, charts the development of methods of seismic data analysis. Topics covered include: the estimation of seismic magnitudes, travel-time tables and epicentres; seismic signal processing; and the use of seismometer arrays. Fully illustrated with seismograms from explosions and earthquakes, the book demonstrates methods and problems of visual analysis. Each chapter provides exercises to help the reader familiarise themselves with practical issues in the field of forensic seismology, and figures and solutions to exercises are also available online. The book is a key reference work for academic researchers and specialists in the area of forensic seismology and Earth structure, and will also be valuable to postgraduates in seismology and solid earth geophysics.

Volcanoes are essential elements in the delicate global balance of elemental forces that govern both the dynamic evolution of the Earth and the nature of Life itself. Without volcanic activity, life as we know it would not exist on our planet. Although beautiful to behold, volcanoes are also potentially destructive, and understanding their nature is critical to prevent major loss of life in the future.

Richly illustrated with over 300 original color photographs and diagrams the book is written in an informal manner, with minimum use of jargon, and relies heavily on first-person, eye-witness accounts of eruptive activity at both "red" (effusive) and "grey" (explosive) volcanoes to illustrate the full spectrum of volcanic processes and their products. Decades of teaching in university classrooms and fieldwork on active volcanoes throughout the world have provided the authors with unique experiences that they have distilled into a highly readable textbook of lasting value. Questions for Thought, Study, and Discussion, Suggestions for Further Reading, and a comprehensive list of source references make this work a major resource for further study of volcanology.

Volcanoes maintains three core foci: Global perspectives explain volcanoes in terms of their tectonic positions on Earth and their roles in earth historyEnvironmental perspectives describe the essential role of volcanism in the moderation of terrestrial climate and atmosphereHumanitarian perspectives discuss the major influences of volcanoes on human societies. This latter is especially important as resource scarcities and environmental issues loom over our world, and as increasing numbers of people are threatened by volcanic hazards

Readership

Volcanologists, advanced undergraduate, and graduate students in earth science and related degree courses, and volcano enthusiasts worldwide.

A companion website is also available for this title at www.wiley.com/go/lockwood/volcanoes

The Network for Earthquake Engineering Simulation (NEES), administered by the National Science Foundation (NSF), is scheduled to become operational in 2004. These network sites will perform a range of experiments to test and validate complex computer models being developed to simulate the behavior of structures subjected to earthquakes. To assist in this effort, the NSF requested the National Research Council(NRC) to frame the major questions to be addressed by and to develop a long-term research agenda for NEES. Preventing Earthquake Disasters presents an overview of the grand challenge including six critical research problems making up that challenge. The report also provides an assessment of earthquake engineering research issues and the role of information technology in that research effort, and a research plan for NEES. Table of Contents Front Matter Executive Summary 1. Preventing Disasters: The Grand Challenge for Earthquake Engineering Research 2. Issues in Earthquake Engineering Research 3. NEES and Grand Challenge Research 4. Revolutionizing Earthquake Engineering Research Through Information Technology 5. Achieving the Grand Challenge: A Research Plan for NEES 6. Recommendations for Meeting the Grand Challenge Appendix A: The George E. Brown, Jr., Network for Earthquake Engineering Simulation Appendix B: Biographies of Committee Members Appendix C: Time Line of Precipitating Events, Discoveries, and Improvements in Earthquake Engineering, 1811-2004 Appendix D: Agendas for the Committee's Public Meetings Appendix E: The Stakeholder Forum

The destructive force of earthquakes has stimulated human inquiry since ancient times, yet the scientific study of earthquakes is a surprisingly recent endeavor. Instrumental recordings of earthquakes were not made until the second half of the 19th century, and the primary mechanism for generating seismic waves was not identified until the beginning of the 20th century. From this recent start, a range of laboratory, field, and theoretical investigations have developed into a vigorous new discipline: the science of earthquakes. As a basic science, it provides a comprehensive understanding of earthquake behavior and related phenomena in the Earth and other terrestrial planets. As an applied science, it provides a knowledge base of great practical value for a global society whose infrastructure is built on the Earth's active crust. This book describes the growth and origins of earthquake science and identifies research and data collection efforts that will strengthen the scientific and social contributions of this exciting new discipline. Table of Contents Front Matter 1. The Challenge of Earthquake Science 2. The Rise of Earthquake Science 3. Facing the Earthquake Threat 4. Observing the Active Earth: Current Technologies and the Role of the Disciplines 5. Earthquake Physics and Fault-System Science 6. Research Opportunities and Requirements 7. Summary Appendix A: Major Federal Earthquake Programs Appendix B: Acronyms and Abbreviations Index

The Loma Prieta earthquake struck the San Francisco area on October 17, 1989, causing 63 deaths and $10 billion worth of damage. This book reviews existing research on the Loma Prieta quake and draws from it practical lessons that could be applied to other earthquake-prone areas of the country. The volume contains seven keynote papers presented at a symposium on the earthquake and includes an overview written by the committee offering recommendations to improve seismic safety and earthquake awareness in parts of the country susceptible to earthquakes. Table of Contents Front Matter Overview: Lessons and Recommendations from the Committee for the Symposium on Practical Lessons from the Loma Prieta Earthquake 1. Legacy of the Loma Prieta Earthquake: Challenges to Other Communities 2. The Geotechnical Aspects 3. Buildings 4. Emergency Preparedness and Response 5. Lifeline Perspective 6. Highway Bridges 7. Recovery, Mitigation, and Planning Appendix A: Symposium Presenters Appendix B: Symposium Agenda Appendix C: Attendees at the Symposium Appendix D: Biographical Sketches of the Members of the Committee on Practical Lessons from the Loma Prieta Earthquake

Volcanoes of Auckland is a handy field guide to the fiery natural world that so deeply shapes New Zealand's largest city - from Rangitoto to One Tree Hill, Lake Pupuke to Orakei Basin. For tens of thousands of years, volcanoes have profoundly shaped the area's geology and geography. And for hundreds of years, volcanoes have played a key part in the lives of Maori and Pakeha - as sites for pa, kumara gardens or twentieth-century military fortifications, as sources of stone and water, and now as parks and reserves for all to enjoy. In a new format designed for the backpack (and including three newly recognised craters), the field guide features: * an accessible introduction to the science of eruptions, including dating and the next eruption * a history of Maori and Pakeha uses of the volcanoes * an illustrated guide to each of Auckland's 53 volcanoes, including where to go and what to do * aerial photography, maps and historic photographs - over 400 illustrations, 80% of them new. This field guide will help readers engage afresh with the history, geography and geology of Auckland's unique volcanic landscape. How many volcanoes are there? When did they erupt and how do we know? Will there be another eruption in Auckland and, if so, where and when? Will we have sufficient warning to evacuate in time? What is a lava cave, a volcanic bomb or a tuff ring? Why were Auckland's volcanoes such an attraction to early Maori? Why is it that Auckland's freshest water comes out of our volcanoes? This book answers these and many more questions. Volcanoes of Auckland is the essential guide for locals and tourists, school children and scientists, as they climb up Mt Eden or North Head and take in the volcanic landscape that so shapes life in our city.

What if Troy was not destroyed in the epic battle immortalized by Homer? What if many legendary cities of the ancient world did not meet their ends through war and conquest as archaeologists and historians believe, but in fact were laid waste by a force of nature so catastrophic that religions and legends describe it as the wrath of god? "Apocalypse" brings the latest scientific evidence to bear on biblical accounts, mythology, and the archaeological record to explore how ancient and modern earthquakes have shaped history--and, for some civilizations, seemingly heralded the end of the world.

Archaeologists are trained to seek human causes behind the ruins they study. Because of this, the subtle clues that indicate earthquake damage are often overlooked or even ignored. Amos Nur bridges the gap that for too long has separated archaeology and seismology. He examines tantalizing evidence of earthquakes at some of the world's most famous archaeological sites in the Mediterranean and elsewhere, including Troy, Jericho, Knossos, Mycenae, Armageddon, Teotihuacan, and Petra. He reveals what the Bible, the "Iliad," and other writings can tell us about the seismic calamities that may have rocked the ancient world. He even explores how earthquakes may have helped preserve the Dead Sea Scrolls. As Nur shows, recognizing earthquake damage in the shifted foundations and toppled arches of historic ruins is vital today because the scientific record of world earthquake risks is still incomplete. "Apocalypse" explains where and why ancient earthquakes struck--and could strike again."

The inner core is a planet within a planet: a hot sphere with a mass of one hundred quintillion tons of iron and nickel that lies more than 5000 kilometres beneath our feet. It plays a crucial role in driving outer core fluid motion and the geodynamo, which generates the Earth's magnetic field. This book is the first to provide a comprehensive review of past and contemporary research on the Earth's inner core from a seismological perspective. Chapters cover the collection, processing and interpretation of seismological data, as well as our current knowledge of the structure, anisotropy, attenuation, rotational dynamics, and boundary of the inner core. Reviewing the latest research and suggesting new seismological techniques and future avenues, it is an essential resource for both seismologists and non-seismologists interested in this fascinating field of research. It will also form a useful resource for courses in seismology and deep Earth processes.

This volume contains papers of the 9th European Workshop on the Seismic Behaviour of Irregular and Complex Structures (9EWICS) held in Lisbon, Portugal, in 2020. This workshop, organized at Instituto Superior Tecnico, University of Lisbon, continued the successful three-annual series of workshops started back in 1996. Its organization had the sponsorship of Working Group 8 (Seismic Behaviour of Irregular and Complex Structures) of the European Association of Earthquake Engineering.This international event provided a platform for discussion and exchange of ideas and unveiled new insights on the possibilities and challenges of irregular and complex structures under seismic actions. The topics addressed include criteria for regularity, seismic design of irregular structures, seismic assessment of irregular and complex structures, retrofit of irregular and complex structures, and soil-structure interaction for irregular and complex structures. Beyond an excellent number of interesting papers on these topics, this volume includes the papers of the two invited lectures - one devoted to irregularities in RC buildings, including perspectives in current seismic design codes, difficulties in their application and further research needs, and another one dedicated to the challenging and very up to date topic in the area of seismic response of masonry building aggregates in historical centers. This volume includes 26 contributions from authors of 11 countries, giving a complete and international view of the problem.The holds particular interest for all the community involved in the challenging task of seismic design, assessment and/or retrofit of irregular and complex structures.

Mount Vesuvius has been famous ever since its eruption in 79 CE, when it destroyed and buried the Roman cities of Pompeii and Herculaneum. But less well-known is the role it played in the science and culture of early modern Italy, as Sean Cocco reveals in this ambitious and wide-ranging study. Humanists began to make pilgrimages to Vesuvius during the early Renaissance to experience its beauty and study its history, but a new tradition of observation emerged in 1631 with the first great eruption of the modern period. Seeking to understand the volcano's place in the larger system of nature, Neapolitans flocked to Vesuvius to examine volcanic phenomena and to collect floral and mineral specimens from the mountainside. In "Watching Vesuvius", Cocco argues that this investigation and engagement with Vesuvius was paramount to the development of modern volcanology. He then situates the native experience of Vesuvius in a larger intellectual, cultural, and political context and explains how later eighteenth-century representations of Naples - of its climate and character - grew out of this tradition of natural history. Painting a rich and detailed portrait of Vesuvius and those living in its shadow, Cocco returns the historic volcano to its place in a broader European culture of science, travel, and appreciation of the natural world.

Christopher Scholz, an internationally recognized expert in the geological fields of seismology and tectonics, here offers a captivating memoir of a three-month-long field expedition to northern Botswana. "Fieldwork" tracks the adventures of a group of American scientists trying to gather critical data in some of the wildest and most inhospitable parts of Africa. Scholz effectively captures the unique challenges and obstacles faced in this kind of scientific endeavor, including mysterious encounters with a primitive bushman tribe and unavoidable dealings with belligerent local officials and even near-fatal stampedes by rampaging elephants. It is through this absorbing tale that Scholz offers a paean to the long and unique traditions of geological fieldwork, and provides readers with an inside view of the trials and joys of scientific fieldwork.

The goal of the Scholz expedition was to determine, by recording tiny natural earthquakes, if a previously unknown arm of the East African Rift system had propagated into the Kalahari Desert from the north. "Fieldwork" tracks the quest of the scientist for a solution to a specific geological problem from the motivations of the scientist, to the initial formulation of the problem, through to the data collection, and finally, the assembly of the critical evidence.

Originally published in 1998.

The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These paperback editions preserve the original texts of these important books while presenting them in durable paperback editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Among all the numerical methods in seismology, the finite-difference (FD) technique provides the best balance of accuracy and computational efficiency. This book offers a comprehensive introduction to FD and its applications to earthquake motion. Using a systematic tutorial approach, the book requires only undergraduate degree-level mathematics and provides a user-friendly explanation of the relevant theory. It explains FD schemes for solving wave equations and elastodynamic equations of motion in heterogeneous media, and provides an introduction to the rheology of viscoelastic and elastoplastic media. It also presents an advanced FD time-domain method for efficient numerical simulations of earthquake ground motion in realistic complex models of local surface sedimentary structures. Accompanied by a suite of online resources to help put the theory into practice, this is a vital resource for professionals and academic researchers using numerical seismological techniques, and graduate students in earthquake seismology, computational and numerical modelling, and applied mathematics.

Improved Seismic Monitoring?Improved Decision-Making, describes and assesses the varied economic benefits potentially derived from modernizing and expanding seismic monitoring activities in the United States. These benefits include more effective loss avoidance regulations and strategies, improved understanding of earthquake processes, better engineering design, more effective hazard mitigation strategies, and improved emergency response and recovery. The economic principles that must be applied to determine potential benefits are reviewed and the report concludes that although there is insufficient information available at present to fully quantify all the potential benefits, the annual dollar costs for improved seismic monitoring are in the tens of millions and the potential annual dollar benefits are in the hundreds of millions. Table of Contents Front Matter Executive Summary 1 Introduction 2 The Role of Seismic Monitoring in Decision-Making 3 Conceptual Framework for Benefit Estimation and a Taxonomy of Benefits 4 Benefits from Improved Earthquake Hazard Assessment and Forecasting 5 Benefits from Improved Loss Estimation Models 6 Benefits from Performance-Based Engineering 7 Benefits for Emergency Response and Recovery 8 Integrating the Benefits--Conclusions and Recommendations References Appendix A: Excerpts from Bernknopf et al. (1993), "Societal Value of Geologic Maps" Appendix B: Committee and Staff Biographies Appendix C: Acronyms and Abbreviations

Complete, practical coverage of the evaluation, analysis, and design and code requirements of seismic isolation systems.

Based on the concept of reducing seismic demand rather than increasing the earthquake resistance capacity of structures, seismic isolation is a surprisingly simple approach to earthquake protection. However, proper application of this technology within complex seismic design code requirements is both complicated and difficult.

Design of Seismic Isolated Structures provides complete, up-to-date coverage of seismic isolation, complete with a systematic development of concepts in theory and practical application supplemented by numerical examples. This book/CD-ROM set helps design professionals navigate and understand the ideas and procedures involved in the analysis, design, and development of specifications for seismic isolated structures. It also provides a framework for satisfying code requirements while retaining the favorable cost-effective and damage control aspects of this new technology. An indispensable resource for practicing and aspiring engineers and architects, Design of Seismic Isolated Structures includes:

• Isolation system components.
• Complete coverage of code provisions for seismic isolation.
• Mechanical characteristics and modeling of isolators.
• Buckling and stability of elastomeric isolators.
• Examples of seismic isolation designs.
• Specifications for the design, manufacture, and testing of isolation devices.

Why do earthquakes happen? What properties control the dynamic rupture and what are the processes at play? Chapters in the present volume capture the current state of the art by displaying an overview of the existing knowledge on the physics of dynamic faulting and promote multidisciplinary contributions on the observational and experimental fault fabric and mechanics, the evolution of fault zone physical and chemical properties, dynamic rupture processes and physically, and observationally, consistent numerical modeling of fault zone during seismic rupture. This volume examines questions such as: * What are the dynamics processes recorded in fault gouge? * What can we learn on rupture dynamic from laboratory experiments? * How on-fault and off-fault properties affect seismic ruptures? How do they evolve trough time? * Insights from physically, and observationally, consistent numerical modeling Fault Zone Dynamic Processes: Evolution of Fault Properties During Seismic Rupture is a valuable contribution for Earth s scientists, researchers and students interested in the earthquakes processes and properties of on-fault and off-fault zones. Its multidisciplinary content is relevant to a broad audience: structural geologist, experimentalists, rocks mechanicians, seismologist, geophysicists and modelers.

When the volcano Tambora erupted in Indonesia in 1815, as many as 100,000 people perished as a result of the blast and an ensuing famine caused by the destruction of rice fields on Sumbawa and neighboring islands. Gases and dust particles ejected into the atmosphere changed weather patterns around the world, resulting in the infamous ''year without a summer'' in North America, food riots in Europe, and a widespread cholera epidemic. And the gloomy weather inspired Mary Shelley to write the gothic novel "Frankenstein."

This book tells the story of nine such epic volcanic events, explaining the related geology for the general reader and exploring the myriad ways in which the earth's volcanism has affected human history. Zeilinga de Boer and Sanders describe in depth how volcanic activity has had long-lasting effects on societies, cultures, and the environment. After introducing the origins and mechanisms of volcanism, the authors draw on ancient as well as modern accounts--from folklore to poetry and from philosophy to literature. Beginning with the Bronze Age eruption that caused the demise of Minoan Crete, the book tells the human and geological stories of eruptions of such volcanoes as Vesuvius, Krakatau, Mount Pelee, and Tristan da Cunha. Along the way, it shows how volcanism shaped religion in Hawaii, permeated Icelandic mythology and literature, caused widespread population migrations, and spurred scientific discovery.

From the prodigious eruption of Thera more than 3,600 years ago to the relative burp of Mount St. Helens in 1980, the results of volcanism attest to the enduring connections between geology and human destiny."

Written for engineers without a background in seismic design. Provides design standards and parameters, explaining how to interpret and apply them. Examines and recommends procedures to accommodate the enormous forces and variations in effects common to major earthquakes. Covers practical aspects of soil behavior and structural and foundation design. Gives tips on special construction situations: foundations, dams and retaining walls, strengthening existing structures and construction over active faults.

This book presents the kinematic earthquake rupture studies from moment tenor to spatial-temporal rupture imaging. For real-time seismic hazard monitoring, the new stable automatic moment tensor (AutoBATS) algorithm is developed and implemented for the real-time MT reports by the Taiwan Earthquake Science Information System (TESIS). In order to understand the rupture behavior of the 2013 Mw 8.3 Okhotsk deep earthquake sequence, the 3D MUltiple SIgnal Classification Back Projection (MUSIC BP) with P and pP phases is applied. The combined P- and pP-wave BP imaging of the mainshock shows two stages of anti-parallel ruptures along two depths separating for about 10~15 km. Unusual super-shear ruptures are observed through the 3D BP images of two Mw 6.7 aftershocks. In last two chapters, the 3D BP imaging reveals similar rupture properties of two shallow catastrophic earthquakes (Mw=6.4) in southwestern Taiwan. Both the 2010 Jiashian and 2016 Meinong earthquakes ruptured westward with similar velocity of ~2.5 km/s along a NE-ward shallow dipping blind fault. The rupture similarities of the doublet suggest two parallel elongate asperities along the causative fault. After several decades of seismic quiescence, the 2010 Jiashian event initiated the rupture at the deeper asperity and triggered the shallower asperity which caused catastrophes six years later.

The book, after two introductory chapters on seismic design principles and structural seismic analysis methods, proceeds with the detailed description of seismic design methods for steel building structures. These methods include all the well-known methods, like force-based or displacement-based methods, plus some other methods developed by the present authors or other authors that have reached a level of maturity and are applicable to a large class of steel building structures. For every method, detailed practical examples and supporting references are provided in order to illustrate the methods and demonstrate their merits. As a unique feature, the present book describes not just one, as it is the case with existing books on seismic design of steel structures, but various seismic design methods including application examples worked in detail. The book is a valuable source of information, not only for MS and PhD students, but also for researchers and practicing engineers engaged with the design of steel building structures.

The so-called "Non-conventional geophysical-geochemical exploration methods" are used, in the particular case of oil and gas exploration, for the detection and mapping of active microseepage of light hydrocarbons with a vertical nature on the gas-oil accumulations. The non-seismic exploration methods used in Cuba are: Remote Sensing, Gravimetry, Aeromagnetometry, Airborne Gamma Spectrometry (AGS) and Morphometry (non-conventional, from the Digital Elevation Model 90x90m). The AGS also classifies, as a non-conventional geophysical-geochemical method, together with the Redox Complex. Besides, it is of interest to know the geological-structural framework where these microseepage occur. That is why the benefits of using these methods (excluding Redox Complex), prior to their integration with geological and seismic data, translate into a first approximation, valid for an initial understanding of geology and mapping of favourable areas of possible gas-oil interest. Finally, from the implementation of these methods (including Redox Complex), perspective sectors for oil and gas are obtained, once the integration with geology and seismic has been carried out. The book presents a brief theoretical account of the methods used and, as practical results, a set of perspective sectors of possible interest for exploration in Cuba. As a complementary result, the book also offer an evaluation of the areas that meet the petroleum-geologist premises for the presence of large accumulations of high quality oil in Cuba.

This book is meant for geoscientists and engineers who are beginners, and introduces them to the field of seismic data interpretation and evaluation. The exquisite seismic illustrations and real case examples interspersed in the text help the readers appreciate the interpretation of seismic data in a simple way, and at the same time, emphasize the multidisciplinary, integrated practical approach to data evaluation. A concerted effort has been made for the readers to realize that mindless interpretation of seismic data using sophisticated software packages, without having a grasp on the elementary principles of geology and geophysics, and coupled with their over-reliance on workstations to provide solutions can have appalling results all too very often.

This book is a comprehensive advancement about the understanding of the volcanology of Mars in all its aspects, from its primary formation to its evolution in time, from the smaller structures to the bigger structures. It discusses the implications of volcanism in the general environmental and geological context of Mars. The book is validating the Southern Giant Impact Hypothesis explaining the formation of Mars in an interdisciplinary approach, including mineralogical, geochemical, volcanological as well as geomorphological information. Implications for future explorations in terms of resources are provided. This book serves as a textbook for undergraduate and graduate level to foster new basic research in the field of planetary volcanology and is a new guide for future missions toward a volcanic world, including new detailed information for the general audience who is always keen to know more about the history of Mars and its large volcanoes. The book also presents an updated situation about the water resources of the planet.

This book focuses on proposing a tsunami early warning system using data assimilation of offshore data. First, Green's Function-based Tsunami Data Assimilation (GFTDA) is proposed to reduce the computation time for assimilation. It can forecast the waveform at Points of Interest (PoIs) by superposing Green's functions between observational stations and PoIs. GFTDA achieves an equivalently high accuracy of tsunami forecasting to the previous approaches, while saving sufficient time to achieve an early warning. Second, a modified tsunami data assimilation method is explored for regions with a sparse observation network. The method uses interpolated waveforms at virtual stations to construct the complete wavefront for tsunami propagation. Its application to the 2009 Dusky Sound, New Zealand earthquake, and the 2015 Illapel earthquake revealed that adopting virtual stations greatly improved the tsunami forecasting accuracy for regions without a dense observation network. Finally, a real-time tsunami detection algorithm using Ensemble Empirical Mode Decomposition (EEMD) is presented. The tsunami signals of the offshore bottom pressure gauge can be automatically separated from the tidal components, seismic waves, and background noise. The algorithm could detect tsunami arrival with a short detection delay and accurately characterize the tsunami amplitude. Furthermore, the tsunami data assimilation approach is combined with the real-time tsunami detection algorithm, which is applied to the tsunami of the 2016 Fukushima earthquake. The proposed tsunami data assimilation approach can be put into practice with the help of the real-time tsunami detection algorithm.