A Study of Near-Source Earthquake Ground Motions of Three California Earthquakes: North Ridge, Whittier, and Landers PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Three datasets were analyzed and maps were prepared of near source ground motions associated with the Whittier, Northridge, and Landers earthquakes in southern California. Vertical motions were enhanced in the near source area of high angle thrust faults at Whittier and Landers, similar to Northridge. Factors are provided for the enhancement in terms of site conditions. Distance factors were established with vertical-to-horizontal ratios. Area patterns of earthquake ground motions were plotted with relation to known faults.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Three datasets were analyzed and maps were prepared of near source ground motions associated with the Whittier, Northridge, and Landers earthquakes in southern California. Vertical motions were enhanced in the near source area of high angle thrust faults at Whittier and Landers, similar to Northridge. Factors are provided for the enhancement in terms of site conditions. Distance factors were established with vertical-to-horizontal ratios. Area patterns of earthquake ground motions were plotted with relation to known faults.
Author: David J. Leeds Publisher: ISBN: Category : Earthquake intensity Languages : en Pages : 68
Book Description
Three datasets were analyzed and maps were prepared of near source ground motions associated with the Whittier, Northridge, and Landers earthquakes in southern California. Vertical motions were enhanced in the near source area of high angle thrust faults at Whittier and Landers, similar to Northridge. Factors are provided for the enhancement in terms of site conditions. Distance factors were established with vertical-to-horizontal ratios. Area patterns of earthquake ground motions were plotted with relation to known faults.
Author: Frank K. Chang Publisher: ISBN: Category : Earthquakes Languages : en Pages : 44
Book Description
This study attempts to determine site effects on earthquake ground motion and the correlation between acceleration and/or velocity generated during the San Fernando Earthquake and topography of the San Gabriel Mountain range. It was found that the contours of peak acceleration and peak velocity generally follow the topography of the San Gabriel Mountain range. The topographical effects on the ground motion could be interpreted in a simple manner as a function of elevation and direction of wave transmission path. The elevation and direction become the dominant factors in the distribution of the ground motion in the near field. A simple, practical method for calculating the bedrock motion using the ground motion-elevation gradient has been applied in the area south of Kagel Mountain and north of Santa Monica Mountain, in the San Fernando Valley. This method is validated using after-shock data. This ground motion-elevation gradient method was applied to an area where the topography has its highest elevation at the epicentral region and decreases in elevation to the surrounding locations in the near field (within 30 km). In any case, when the epicenter occurs at an elevation lower than the elevation of the surrounding area, this gradient method may not be applicable and must be tested for this alternate condition.
Author: National Research Council Publisher: National Academies Press ISBN: 0309169097 Category : Science Languages : en Pages : 430
Book Description
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.
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Author: David J. Leeds
Author: Luis Munguía-Orozco
Author: Frank K. Chang
Author: R. D. Borcherdt
Author: National Research Council
Author: Tetsuo Kubo
Author: Paul Somerville
Author: H. J. Swanger
Author: Geological Survey (U.S.)