State of the Art for Assessing Earthquake Hazards in the United States
State of the Art for Assessing Earthquake Hazards in the United States

Author: Jack L. Walper

Publisher:

Published: 1976

Total Pages: 106

ISBN-13:

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The emerging theory of plate tectonics, embodying continental drift, seafloor spreading, transform faults, subduction of lithospheric plates, and other basic tenets, provides earth scientists with a reasonably coherent and workable explanation of the occurrence and distribution of earthquakes. It explains the tectonic origin of belts of major seismic activity throughout the United States and provides a consistent pattern into which focal mechanisms of major earthquakes can be fitted. It provides a framework into which a wide variety of observations of geology and geophysics can be assimilated. In short, it is a unifying concept long sought by earth scientists.

Earthquakes
Earthquakes

Author: Taher Zouaghi

Publisher: BoD – Books on Demand

Published: 2017-02-01

Total Pages: 390

ISBN-13: 953512885X

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This book is devoted to diverse aspects of earthquake researches, especially to new achievements in seismicity that involves geosciences, assessment, and mitigation. Chapters contain advanced materials of detailed engineering investigations, which can help more clearly appreciate, predict, and manage different earthquake processes. Different research themes for diverse areas in the world are developed here, highlighting new methods of studies that lead to new results and models, which could be helpful for the earthquake risk. The presented and developed themes mainly concern wave's characterization and decomposition, recent seismic activity, assessment-mitigation, and engineering techniques. The book provides the state of the art on recent progress in earthquake engineering and management. The obtained results show a scientific progress that has an international scope and, consequently, should open perspectives to other still unresolved interesting aspects.

Improved Seismic Monitoring - Improved Decision-Making
Improved Seismic Monitoring - Improved Decision-Making

Author: National Research Council

Publisher: National Academies Press

Published: 2006-01-04

Total Pages: 196

ISBN-13: 0309165032

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Improved Seismic Monitoringâ€"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.

Assessment of Interplate and Intraplate Earthquakes
Assessment of Interplate and Intraplate Earthquakes

Author: Srigiri Shankar Bellam

Publisher:

Published: 2012

Total Pages:

ISBN-13:

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The earth was shown in the last century to have a surface layer composed of large plates. Plate tectonics is the study of the movement and stresses in the individual plates that make up the complete surface of the world's sphere. Two types of earthquakes are observed in the surface plates, interplate and intraplate earthquakes, which are classified, based on the location of the origin of an earthquake either between two plates or within the plate respectively. Limited work has been completed on the definition of the boundary region between the plates from which interplate earthquakes originate, other than the recent work on the Mid Atlantic Ridge, defined at two degrees and the subsequent work to look at the applicability of this degree based definition. Others suggested an alternative view of a constant width for the interplate region in recent work at Texas A & M University. The objective of the paper is to determine whether the assumption of a linear width of the region along the tectonic plate boundaries to classify earthquakes as interplate and intraplate earthquakes using accepted statistical criteria provides a better fit to the data than the constant degree definition. There are three types of interplate boundaries defined by the relative movement of the two plates to each other, which further complicates this study. The study used a nonrandom analysis of regions of the different types of boundary to compare the rate and decay of the intraplate earthquakes from a notional centerline for the known boundaries. The study used GIS software and EXCEL for the statistical analysis component of the research work. The results show that a constant width definition provides a number of advantages in determining the relative definition of interplate and intraplate earthquakes when compared to the constant degree definition developed for work on the Mid Atlantic Ridge. Further research is suggested on a randomly selected set of study sites to improve the reliability and quality of the statistical work for each type of the boundary of the tectonic plates.