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Author : Francisco Javier Nuñez-Cornu
Publisher : Frontiers Media SA
ISBN 13 : 2889749436
Total Pages : 199 pages
Book Rating : 4.8/5 (897 download)
Download or read book Advances in ocean bottom seismology written by Francisco Javier Nuñez-Cornu and published by Frontiers Media SA. This book was released on 2023-03-27 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : LeRoy M. Dorman
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (318 download)
Download or read book Seismic Detection and Discrimination Using Ocean-bottom Seismographs written by LeRoy M. Dorman and published by . This book was released on 1980 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research progress on seismic detection and discrimination using ocean-bottom seismographs (OBS's) is outlined. During this first year of DARPA contract work, our investigations have been focused primarily on using existing OBS data to address the problem of sea-floor seismic noise and to constrain models of the near-bottom seismic environment. We have completed noise studies at six of our previously occupied OBS sites. The noise levels of typical amplitude spectra roll off rapidly out to 2-4 Hz and much less rapidly beyond 4 Hz. At frequencies above 4 Hz, the noise levels are low, typically a few nanometers/Hz1/2 or less and comparable to good land-based stations. Several correlations between noise levels and other parameters, such as sediment thickness, distance from the continental margin and sea state, are discussed and used to constrain possible noise mechanisms. We hypothesize that the dominant mechanism of high-frequency (>2 Hz) noise generation at most of the sites examined thus far is of local oceanographic origin, exciting acoustic modes in the water column which couple to Stoneley modes at the sediment-water interface and waveguide modes within the sediment column. This hypothesis is supported by the analysis of noise data from two OBS arrays, which shows that the noise coherence is very low for pairs of sensors separated by as little as 200 m. We also outline some of the conclusions relevant to the seismic noise problem deduced by us from the data collected during the Lopez Island intercalibration experiment.
Author : Michael Beer
Publisher : Springer
ISBN 13 : 9783642353437
Total Pages : 3953 pages
Book Rating : 4.3/5 (534 download)
Download or read book Encyclopedia of Earthquake Engineering written by Michael Beer and published by Springer. This book was released on 2016-01-30 with total page 3953 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Earthquake Engineering is designed to be the authoritative and comprehensive reference covering all major aspects of the science of earthquake engineering, specifically focusing on the interaction between earthquakes and infrastructure. The encyclopedia comprises approximately 300 contributions. Since earthquake engineering deals with the interaction between earthquake disturbances and the built infrastructure, the emphasis is on basic design processes important to both non-specialists and engineers so that readers become suitably well informed without needing to deal with the details of specialist understanding. The encyclopedia’s content provides technically-inclined and informed readers about the ways in which earthquakes can affect our infrastructure and how engineers would go about designing against, mitigating and remediating these effects. The coverage ranges from buildings, foundations, underground construction, lifelines and bridges, roads, embankments and slopes. The encyclopedia also aims to provide cross-disciplinary and cross-domain information to domain-experts. This is the first single reference encyclopedia of this breadth and scope that brings together the science, engineering and technological aspects of earthquakes and structures.
Author : Junzo Kasahara
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.3/5 (121 download)
Download or read book Ocean Bottom Seismometer Study of the Kuril Trench Area written by Junzo Kasahara and published by . This book was released on 1976 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: An ocean bottom seismograph was deployed on the seaward side of the Kuril Trench off Hokkaido, Japan, in 5460 m of water, in August 1975 during the joint Soviet-American Tsunami Expedition. During the seven-day record, S-P times were distributed in three groups: 19-24 sec, corresponding to aftershocks of the 10 June and 13 June 1975 earthquakes southeast of Nemuro, Japan and to earthquakes east of Sanriku, Japan; approximately 30 sec, from south of Erimo Peninsula, Hokkaido; and approximately 100 sec, from the Izu-Bonin Islands. Seven earthquakes, with hypocenters well determined by the land seismic net, are studied in detail. A shallow focus earthquake yields typical oceanic mantle velocities shallower than 50 km in the slab which dips under the Japanese archipelago. However, deeper focus earthquakes reveal anomalously high velocities averaged over the upper 230 km, in agreement with the models of Utsu and Oliver and Isacks. Two deep earthquakes, whose paths lie in the Pacific Ocean asthenosphere, suggest a velocity 3% lower than that predicted by Jeffreys-Bullen, in agreement with the above models. Spectral analysis of S arrivals suggests Q sub s values of 1000-1500 for nearby earthquakes and 4000-6000 for longer-distance earthquakes, implying an unusual attenuation mechanism for long travel paths, which enhances the high frequencies.
Author : G. M. Purdy
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (131 download)
Download or read book Ocean Bottom Seismology written by G. M. Purdy and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hamish Wilson
Publisher : Cambridge University Press
ISBN 13 : 1108842887
Total Pages : 357 pages
Book Rating : 4.1/5 (88 download)
Download or read book Integration of Geophysical Technologies in the Petroleum Industry written by Hamish Wilson and published by Cambridge University Press. This book was released on 2021-12-16 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of geophysical technologies, how they should be deployed and integrated for improved petroleum exploration and production.
Author :
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (227 download)
Download or read book Seismic Detection and Discrimination Using Ocean-Bottom Seismographs written by and published by . This book was released on 1981 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Around January 29, 1980 a mild storm occurred on the Southern California coast. During this time one of our ocean bottom seismographs (O.B.S.) was periodically recording noise samples at 31 deg N, 119 deg 48 min W, about 370 km offshore in 4 km of water. The noise energy in the 1-3 Hz frequency range correlates most strongly with the wave height on the nearby coast. The local and distant wind data were dissimilar in the durations of the disturbance and in the time of the peak amplitude. We conclude that sea floor noise near 1 Hz comes predominantly from the surf. The nonlinear mechanisms which transfer energy from gravity waves on the sea surface into the sea floor are so inefficient at these frequencies that the contribution from surf a few hundred km away dominates the energy from the sea surface a few km away. An array of 4 ocean-bottom seismometers (O.B.S.) was operated for one month during June-July, 1977 at 16.5 deg N, 100.5 deg W in the Middle America Trench near Acapulco. The purpose of the experiment was to investigate the seismicity of the accretionary prism and to study the propagation of seismic waves across the continental margin. The location of earthquakes occurring landward of the OBS array was controlled by a 7-station land-based array operated by a team of Mexican seismologists under the direction of Dr. Lautaro Ponce Mori.
Author : J. D. Duschenes
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (593 download)
Download or read book Aspects of Ocean Bottom Seismology written by J. D. Duschenes and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jack Ertle Oliver
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (88 download)
Download or read book Ocean-bottom Seismology written by Jack Ertle Oliver and published by . This book was released on 1963 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tatsuhiko Saito
Publisher : Springer
ISBN 13 : 4431568506
Total Pages : 265 pages
Book Rating : 4.4/5 (315 download)
Download or read book Tsunami Generation and Propagation written by Tatsuhiko Saito and published by Springer. This book was released on 2019-01-23 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces a framework of tsunami modelling from generation to propagation, aimed at application to the new observation started in Japan after the devastating tsunami of the 2011 Tohoku-Oki earthquake. About 150 seismic and tsunami sensors were deployed in a wide region off the Pacific coast of eastern Japan in order to catch tsunami generation inside the focal area, which makes a clear departure from conventional observations that detect tsunamis far from the source region. In order to exploit the full potential of this new observation system, it is not enough to model tsunami generation simply by static sea-bottom deformation caused by an earthquake. This book explains dynamic tsunami generation and sea-bottom deformation by kinematic earthquake faulting, in which seismic and acoustic waves are also included in addition to static sea-bottom deformation. It then systematically derives basic tsunami equations from the fundamental equations of motions. The author also illustrates the details of numerical schemes and their applications to tsunami records, making sound linkages among these topics to naturally understand how a tsunami is physically or mathematically described. This book will be a comprehensive guide for graduate students and young researchers to start their research activities smoothly.
Author : Ray Abma
Publisher : SEG Books
ISBN 13 : 1560803789
Total Pages : 220 pages
Book Rating : 4.5/5 (68 download)
Download or read book Simultaneous Source Seismic Acquisition written by Ray Abma and published by SEG Books. This book was released on 2020-12-31 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces simultaneous source technology and helps those who practice it succeed. Although the book does not include all developments, which would have entailed a much longer treatise, this work is written through the lens of decades of experiences and allows readers to understand the development of independent simultaneous sourcing. The relationships between data acquisition and data processing are discussed because never before have they been so intertwined as in this area. In addition to describing the underlying technologies, this book also is a user-guide which discusses survey design and acquisition and decribes the sensitivities of the processing algorithms which can allow simultaneous source technology to succeed. The audience for this book includes acquisition and processing geophysicists who will work with these data as well as those who require only an overview of the state of the art; and, even though they may not need the full technical details, they may want to know the limitations and advantages of using simultaneous sources.
Author : Argentina
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.3/5 (121 download)
Download or read book Seismic Observations written by Argentina and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carlos Rodriguez Suarez
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (15 download)
Download or read book Advanced Marine Seismic Methods written by Carlos Rodriguez Suarez and published by . This book was released on 2000 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : George H. Sutton
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (163 download)
Download or read book Research in Seismology Related to the Columbia Ocean-bottom Seismograph written by George H. Sutton and published by . This book was released on 1969 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. Akal
Publisher : Springer Science & Business Media
ISBN 13 : 1461322014
Total Pages : 898 pages
Book Rating : 4.4/5 (613 download)
Download or read book Ocean Seismo-Acoustics written by T. Akal and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seafloor investigation has long been a feature of not only seismology but also of acoustics. Indeed it was acoustics that produced depth sounders, giving us the first capability of producing both global and local maps of the seafloor. Subsequently, better instrumentation and techniques led to a clearer, more quantitative picture of the seabed itself, which stimulated new hypotheses such as seafloor spreading through the availability of more reliable data on sediment thickness over ocean basins and other bottom features. Geologists and geophysicists have used both acoustic and seismic methods to study the seabed by considering the propagation of signals arising from both natural seismic events and man-made impulsive sources. Although significant advances have been made in instrumentation, such as long towed geophysical arrays, ai r guns and ocean bot tom seismometers, the pic ture of the seafloor is still far from complete. Underwater acoustics concerns itself today with the phenomena of propagation and noise at frequencies and ranges that require an understanding of acoustic interaction at both of its boundaries, the sea surface and seafloor, over depths ranging from tens to thousands of meters. Much of the earlier higher frequency (>1 kHz) work included the characterization of the seafloor in regimes of reflection coefficients which were empirically derived from surveys. The results of these studies met with only limited success, confined as they were to those areas where survey data existed and lacking a physical understanding of the processes of reflection and scattering.
Author : I. Tsvankin
Publisher : Elsevier
ISBN 13 : 9780080446189
Total Pages : 472 pages
Book Rating : 4.4/5 (461 download)
Download or read book Seismic Signatures and Analysis of Reflection Data in Anisotropic Media written by I. Tsvankin and published by Elsevier. This book was released on 2005-06-13 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following the breakthrough in the last decade in identifying the key parameters for time and depth imaging in anisotropic media and developing practical methodologies for estimating them from seismic data, Seismic Signatures and Analysis of Reflection Data in Anisotropic Media primarily focuses on the far reaching exploration benefits of anisotropic processing. This volume provides the first comprehensive description of reflection seismic signatures and processing methods in anisotropic media. It identifies the key parameters for time and depth imaging in transversely isotropic media and describes practical methodologies for estimating them from seismic data. Also, it contains a thorough discussion of the important issues of uniqueness and stability of seismic velocity analysis in the presence of anisotropy. The book contains a complete description of anisotropic imaging methods, from the theoretical background to algorithms to implementation issues. Numerous applications to synthetic and field data illustrate the improvements achieved by the anisotropic processing and the possibility of using the estimated anisotropic parameters in lithology discrimination. Focuses on the far reaching exploration benefits of anisotropic processing First comprehensive description of reflection seismic signatures and processing methods in anisotropic media
Author :
Publisher : Academic Press
ISBN 13 : 0128130822
Total Pages : 4318 pages
Book Rating : 4.1/5 (281 download)
Download or read book Encyclopedia of Ocean Sciences written by and published by Academic Press. This book was released on 2019-04-12 with total page 4318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans cover 70% of the Earth’s surface, and are critical components of Earth’s climate system. This new edition of Encyclopedia of Ocean Sciences, Six Volume Set summarizes the breadth of knowledge about them, providing revised, up to date entries as well coverage of new topics in the field. New and expanded sections include microbial ecology, high latitude systems and the cryosphere, climate and climate change, hydrothermal and cold seep systems. The structure of the work provides a modern presentation of the field, reflecting the input and different perspective of chemical, physical and biological oceanography, the specialized area of expertise of each of the three Editors-in-Chief. In this framework maximum attention has been devoted to making this an organic and unified reference. Represents a one-stop. organic information resource on the breadth of ocean science research Reflects the input and different perspective of chemical, physical and biological oceanography, the specialized area of expertise of each of the three Editors-in-Chief New and expanded sections include microbial ecology, high latitude systems and climate change Provides scientifically reliable information at a foundational level, making this work a resource for students as well as active researches
