Author: Robert Anthony SohnPublisher:
ISBN:
Category : Plate tectonics
Languages : en
Pages : 182
Book Description
Oceanic Spreading Center Accretionary Process Studies with Ocean Bottom Seismometers
Author: Robert Anthony SohnPublisher:
ISBN:
Category : Plate tectonics
Languages : en
Pages : 182
Book Description
Investigation of Oceanic Spreading Center Hydrothermal Processes Using Ocean Bottom Seismometers
Author: Charles Edward GoldenPublisher:
ISBN:
Category :
Languages : en
Pages : 210
Book Description
Studies of the Upper Oceanic Floor Using Ocean Bottom Seismometers
Author: Allan Wayne SauterPublisher:
ISBN:
Category : Ocean bottom
Languages : en
Pages : 234
Book Description
Ocean Bottom Seismometer Study of the Kuril Trench Area
Author: Junzo KasaharaPublisher:
ISBN:
Category : Marine geophysics
Languages : en
Pages : 108
Book Description
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.
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 680
Book Description
Modern Ocean Floor Processes and the Geological Record
Author: Rachel A. MillsPublisher: Geological Society of London
ISBN: 9781862390232
Category : Science
Languages : en
Pages : 316
Book Description
Broadband Seismology in the Oceans
Author: Imaging the Seismic Structure Beneath Oceanic Spreading Centers Using Ocean Bottom Geophysical Techniques
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
I demonstrate that the OBS orientations can be robustly estimated through maximizing the correlation between the diagonal and cross terms of the noise correlation function. This method is applied to the ELSC OBS experiment dataset and the obtained orientations are consisent with results from a conventional teleseismic method. The new method is promising for a wide range of applications.
Special Issue on Oceanic Spreading Center Processes
Author: Contributions - Scripps Institution of Oceanography
Author: Scripps Institution of OceanographyPublisher:
ISBN:
Category : Marine biology
Languages : en
Pages : 448
Book Description