State Of The Art For Assessing Earthquake Hazards In The United States

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State-of-the-art for Assessing Earthquake Hazards in the United States

Charles E. Glass,David B. Slemmons
State of the art for Assessing Earthquake Hazards in the United States Book PDF

Author : Charles E. Glass,David B. Slemmons
Publisher : Unknown
Page : 248 pages
File Size : 51,8 Mb
Release : 1978
Category : Aerial photography in geology
ISBN : IND:30000138369248

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State-of-the-art for Assessing Earthquake Hazards in the United States by Charles E. Glass,David B. Slemmons Pdf

Recent advances in the fields of remote sensing, engineering geology, seismology, and earthquake engineering have developed a need for a systematic comprehensive review of the basic principles and methods of applying remote sensing for evaluation of earthquakes hazards and seismic risk. This paper responds to this need by reviewing basic concepts, summarizing essential, state-of-the-art knowledge of theory and instrumental methods, establishing procedures evaluations, and discussing representative case histories that illustrate earthquake hazard evaluations that are based on remote sensing analysis. The approach that is recommended is based on a 'multi' approach that uses an integrated and systematic study of a region or a fault with a variety of imagery varying from small-scale (synoptic) to large-scale (detailed). The imagery analysis should be followed by a ground verification program of study that should include both ground and aerial reconnaissance examination of the major geologic structures of concern. The character of the earthquake hazards is discussed in the context of the lithologic, structural, vegetational, and topographic variations that are associated with different types of active geologic structures. The response of earth materials, landforms, and geologic structures is summarized for the several main types of passive and active electromagnetic radiation used in current remote-sensing practice. Limitations of the different spectral regions used in remote sensing are reviewed to assist in the selection of ideal methods or sequences of methods of study for effective evaluation of active or capable faults and for assessing the earthquake potential of geological structures that may affect a given engineering site.

State-of-the-art for Assessing Earthquake Hazards in the United States

Otto W. Nuttli,Robert B. Herrmann
State of the art for Assessing Earthquake Hazards in the United States Book PDF

Author : Otto W. Nuttli,Robert B. Herrmann
Publisher : Unknown
Page : 116 pages
File Size : 47,7 Mb
Release : 1978
Category : Earthquakes
ISBN : UOM:39015086520114

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State-of-the-art for Assessing Earthquake Hazards in the United States by Otto W. Nuttli,Robert B. Herrmann Pdf

This report is concerned with the problem of estimating credible values of the peak velocity and acceleration of the ground motion for central United States earthquakes. The report contains a catalog of all known earthquakes large enough to be felt or of body-wave magnitude greater than or equal to 3. The data of the catalog are plotted on a map, which together with structural geological information is used to identify eight seismic source zones in the central United States. The boundaries of the source zones are inexact, so that special study will be required for establishing credible ground-motion values for sites near the boundaries. A maximum-magnitude earthquake is determined for each zone, as well as a magnitude-recurrence equation. Using the Murphy-O'Brien formulation, as well as theoretical results of Herrmann and a limited amount of strong-motion data for the central United States, equations are derived for that region which relate maximum horizontal acceleration and velocity to body-wave magnitude and epicentral distance. (Author).

State-of-the-Art for Assessing Earthquake Hazards in the United States Report 3. Factors in the Specification of Ground Motions for Design Earthquakes in California

Renner B. Hofmann
State of the Art for Assessing Earthquake Hazards in the United States Report 3 Factors in the Specification of Ground Motions for Design Earthquakes in California Book PDF

Author : Renner B. Hofmann
Publisher : Unknown
Page : 103 pages
File Size : 48,6 Mb
Release : 1974
Category : Earthquakes
ISBN : OCLC:227591849

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State-of-the-Art for Assessing Earthquake Hazards in the United States Report 3. Factors in the Specification of Ground Motions for Design Earthquakes in California by Renner B. Hofmann Pdf

Accelerations of 0.4g to over 1.0g from earthquakes of magnitudes 4.5 to 6.5 have been recorded near their sources. In practice, design earthquake procedures extrapolate recorded data, usually to within a few miles of the source fault. The bases for these extrapolations either are purely statistical or are contingent upon assumed time functions of fault displacement. When modified to account for fault dislocation, curves of maximum acceleration at a predominant period versus magnitude and depth adequately predict peak accelerations near the source as well as at a distance. Peak accelerations occur only during a fraction of the duration of high-amplitude shaking and attenuate more rapidly with distance than the general level of high accelerations. Peak accelerations at 10 Hz appear to be limited by the effective stress locking a fault just prior to the time of rupture. Peaks up to 2.0g may or may not occur and are essentially independent of magnitude. Topography, absorption, and transmission of seismic energy through sedimentary layers are shown to have frequency- and distance-dependent effects on the resulting shaking at the surface. Duration of shaking and distortions of the surface in areas of sedimentary cover are also shown to be important considerations in the specification of design earthquakes. (Modified author abstract).

State-of-the-art for Assessing Earthquake Hazards in the United States

David B. Slemmons
State of the art for Assessing Earthquake Hazards in the United States Book PDF

Author : David B. Slemmons
Publisher : Unknown
Page : 174 pages
File Size : 49,9 Mb
Release : 1977
Category : Buildings
ISBN : UOM:39015086520171

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State-of-the-art for Assessing Earthquake Hazards in the United States by David B. Slemmons Pdf

The short seismologic and historic records, in combination with the long recurrence intervals between potentially damaging earthquakes, create a need for developing geologic methods as alternatives or supplements to seismologic methods of establishing design earthquakes. The main goal of this report is to review geologic methods of determining the maximum probable earthquakes for active faults based on empirical relationships between magnitude, length of surface faulting, maximum fault displacement, and combinations of fault length and maximum displacement.

State-of-the-art for Assessing Earthquake Hazards in the United States

Bruce A. Bolt,Geotechnical Laboratory (U.S.)
State of the art for Assessing Earthquake Hazards in the United States Book PDF

Author : Bruce A. Bolt,Geotechnical Laboratory (U.S.)
Publisher : Unknown
Page : 102 pages
File Size : 49,7 Mb
Release : 1983
Category : Earth movements
ISBN : UOM:39015086520270

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State-of-the-art for Assessing Earthquake Hazards in the United States by Bruce A. Bolt,Geotechnical Laboratory (U.S.) Pdf