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91.
A. I. Zaitsev D. P. Kovalev A. A. Kurkin B. V. Levin E. N. Pelinovskii A. G. Chernov A. Yalciner 《Russian Journal of Pacific Geology》2009,3(5):437-442
Instrumental data on the tsunami registration on Sakhalin and Hokkaido islands are presented. The numerical simulation of
the tsunami propagation in the Tatar Strait was performed. The results of the calculations are in satisfactory agreement with
the observed data. 相似文献
92.
C. Emdad Haque Dale Dominey-Howes Nuray Karanci Gerassimos Papadopoulos Ahmet Yalciner 《Natural Hazards》2003,29(3):307-308
Editorial Introduction
Editorial 相似文献93.
Recently, geographic information system Software’s are widely used in engineering geology applications. Such a study was performed
in the Eskisehir urban area of about 30 km2 via geo-engineering maps, cross-sections and panel-block diagrams, which are formed to predict the properties of foundation
soil. In order to determine the engineering geology properties of the region, physical and mechanical characteristics of the
soil profile were tested on 1,011 disturbed and 383 undisturbed samples from a total of 170 boreholes. Topographic, lithological
and geotechnical data of the region were compiled as a database in computer. Five geological cross-sections were drawn to
decipher specifically the alluvial deposits in detail in densely populated areas. Hence, geological characteristics of the
area were evaluated in a three-dimensional mode. Five standard penetration test (SPT) cross-sections at the same directions
and SPT, uniaxial compressive strength (qu) and soil class Zonation maps were produced at different depths and panel-block
diagrams were also created to define the geo-engineering properties of the investigation area. In this respect, the sub-surface
of the study area is fully visualized and useful predictor maps, cross-sections and panel-block diagrams are performed to
be used in further studies. 相似文献
94.
Forward modelling receiver functions for crustal structure beneath station TBZ (Trabzon, Turkey) 总被引:4,自引:0,他引:4
Özcan Çakr Murat Erduran Hakan Çnar & Ahmet Ylmaztürk 《Geophysical Journal International》2000,140(2):341-356
We use teleseismic three-component digital data from the Trabzon, Turkey broadband seismic station TBZ to model the crustal structure by the receiver function method. The station is located at a structural transition from continental northeastern Anatolia to the oceanic Black Sea basin. Rocks in the region are of volcanic origin covered by young sediments. By forward modelling the radial receiver functions, we construct 1-D crustal shear velocity models that include a lower crustal low-velocity zone, indicating a partial melt mechanism which may be the source of surfacing magmatic rocks and regional volcanism. Within the top 5 km, velocities increase sharply from about 1.5 to 3.5 km s−1 . Such near-surface low velocities are caused by sedimentation, extending from the Black Sea basin. Velocities at around 20 km depth have mantle-like values (about 4.25 km s−1 ), which easily correlate to magmatic rocks cropping out on the surface. At 25 km depth there is a thin low-velocity layer of about 4.0 km s−1 . The average Moho velocity is about 4.6 km s−1 , and its depth changes from 32 to 40 km. Arrivals on the tangential components indicate that the Moho discontinuity dips approximately southwards, in agreement with the crustal thickening to the south. We searched for the solution of receiver functions around the regional surface wave group velocity inversion results, which helped alleviate the multiple solution problem frequently encountered in receiver function modelling.
Station TBZ is a recently deployed broadband seismic station, and the aim of this study is to report on the analysis of new receiver function data. The analysis of new data in such a structurally complex region provides constraining starting models for future structural studies in the region. 相似文献
Station TBZ is a recently deployed broadband seismic station, and the aim of this study is to report on the analysis of new receiver function data. The analysis of new data in such a structurally complex region provides constraining starting models for future structural studies in the region. 相似文献
95.
96.
Marlon E. Pierce Geoffrey C. Fox Mehmet S. Aktas Galip Aydin Harshawardhan Gadgil Zhigang Qi Ahmet Sayar 《Pure and Applied Geophysics》2008,165(3-4):635-651
We describe our distributed systems research efforts to build the “cyberinfrastructure” components that constitute a geophysical Grid, or more accurately, a Grid of Grids. Service-oriented computing principles are used to build a distributed infrastructure of Web accessible components for accessing data and scientific applications. Our data services fall into two major categories: Archival, database-backed services based around Geographical Information System (GIS) standards from the Open Geospatial Consortium, and streaming services that can be used to filter and route real-time data sources such as Global Positioning System data streams. Execution support services include application execution management services and services for transferring remote files. These data and execution service families are bound together through metadata information and workflow services for service orchestration. Users may access the system through the QuakeSim scientific Web portal, which is built using a portlet component approach. 相似文献
97.
98.
Mehmet Aktas Galip Aydin Andrea Donnellan Geoffrey Fox Robert Granat Lisa Grant Greg Lyzenga Dennis McLeod Shrideep Pallickara Jay Parker Marlon Pierce John Rundle Ahmet Sayar Terry Tullis 《Pure and Applied Geophysics》2006,163(11-12):2281-2296
We describe the goals and initial implementation of the International Solid Earth Virtual Observatory (iSERVO). This system is built using a Web Services approach to Grid computing infrastructure and is accessed via a component-based Web portal user interface. We describe our implementations of services used by this system, including Geographical Information System (GIS)-based data grid services for accessing remote data repositories and job management services for controlling multiple execution steps. iSERVO is an example of a larger trend to build globally scalable scientific computing infrastructures using the Service Oriented Architecture approach. Adoption of this approach raises a number of research challenges in millisecond-latency message systems suitable for internet-enabled scientific applications. We review our research in these areas. 相似文献
99.
The city of Adapazarı — located in the Marmara Region of northwest Turkey — is situated on a deep sedimentary basin and was
the city most heavily damaged by the strong ground motion of the 17 August 1999 Kocaeli earthquake (moment magnitude Mw = 7.4). This study determines site amplifications of the attenuation relationships for shallow earthquakes in the Adapazarı
basin by using the previous ground motion prediction equations (GMPEs) and the traditional spectral ratio method. The site
amplifications are determined empirically by averaging the residuals between the observed and predicted peak ground acceleration
(PGA) and spectral acceleration (SA) values for various periods. Residuals are significantly correlated with the known characteristics
of geological units. A new attenuation model has also been developed for 5% damped spectral acceleration to determine the
dependence of strong ground motions on frequency. 相似文献
100.
Sinan Akkar Özkan Kale Ahmet Yakut Ulubey Çeken 《Bulletin of Earthquake Engineering》2018,16(8):3439-3463
This study describes the methodology implemented to establish the ground-motion logic-tree for national probabilistic seismic hazard map of Turkey for shallow active crustal regions. The presented procedure provides quantitative information to guide the hazard experts while establishing the logic tree to capture the epistemic uncertainty in ground-motion characterization. It uses non-data-driven and data-driven testing methods to identify and rank candidate ground-motion prediction equations (GMPEs) under a specific ground-motion database. The candidate GMPEs are subjected to visual inspection and are classified into center, body and range (CBR) spectral estimates for a proper consideration of epistemic uncertainty. The GMPEs classified into CBR are then used in a suite of seismic hazard sensitivity analysis to establish the most suitable GMPE logic-tree whose spectral estimates are not biased by any one of the GMPEs in the logic-tree structure. The sensitivity analysis considers normalized spectral ordinates and is not manipulated by the spectral amplitudes. The proposed procedure is inherited from the relevant studies of the Earthquake Model of the Middle East (EMME; www.efehr.org:8080/jetspeed/portal/emme.psml) regional seismic hazard project. This paper also highlights the similarities and differences in ground-motion characterization between EMME and our approach. 相似文献