12th June 2017 offshore Karaburun- Lesvos Island Earthquake Co-seismic Deformation Analysis using Continuous GPS and Seismological data

2021 ◽  
Keyword(s):  
Deformation Analysis ◽  
Seismological Data ◽  
Seismic Deformation ◽  
Continuous Gps

scholarly journals Pattern of seismic deformation in the Western Mediterranean

1999 ◽  
Vol 42 (1) ◽  
Author(s):  
S. Pondrelli
Keyword(s):  
Moment Tensor ◽  
Plate Boundary ◽  
Eastern Alps ◽  
Western Mediterranean ◽  
Plate Motion ◽  
Moment Tensors ◽  
Motion Models ◽  
Strain Pattern ◽  
Seismological Data ◽  
Seismic Deformation

The seismic deformation of the Western Mediterranean was studied with the aim of defining the strain pattern that characterizes the Africa-Eurasia plate boundary in this area. Within different sections along the boundary the cumulative moment tensor was computed over 90 years of seismological data. The results were compared with NUVELlA plate motion model and geodetic data. A stable agreement was found along Northern Africa to Sicily, where only Africa and Eurasia plates are involved. In this zone it is evident that changes in the strike of the boundary correspond to variations in the prevailing geometry of deformation, tectonic features and in the percentage of seismic with respect to total expected deformation. The geometry of deformation of periadriatic sections (Central to Southern Apennines, Eastern Alps and the Eastern Adriatic area) agrees well with VLBI measurements and with regional geological features. Seismicity seems to account for low rates, from 3% to 31%, of total expected deformation. Only in the Sicily Strait, characterized by extensional to strike slip deformation, does the ratio reach a higher value (79%). If the amount of deformation deduced from seismicity seems low, because 90 years are probably not representative of the recurrence seismic cycle of the Western Mediterranean, the strain pattern we obtain from cumulative moment tensors is more representative of the kinematics of this area than global plate motion models and better identifies lower scale geodynamic features.

Seismic Deformation Analysis of Embankment Dams Using Simplified Total-Stress Approach

2019 ◽  
Vol 145 (10) ◽  
pp. 04019076
Author(s):  
Kevin Zeh-Zon Lee ◽  
Navead Jensen ◽  
David R. Gillette ◽  
Derek T. Wittwer
Keyword(s):  
Deformation Analysis ◽  
Total Stress ◽  
Embankment Dams ◽  
Seismic Deformation

Seismic deformation analysis of Tuttle Creek Dam

2012 ◽  
Vol 49 (3) ◽  
pp. 323-343 ◽  
Author(s):  
Timothy D. Stark ◽  
Michael H. Beaty ◽  
Peter M. Byrne ◽  
Gonzalo Castro ◽  
Francke C. Walberg ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Constitutive Models ◽  
Deformation Analysis ◽  
East Central ◽  
Fine Grained ◽  
Upstream Slope ◽  
Downstream Slope ◽  
Soil Constitutive Models ◽  
Seismic Deformation

To facilitate the design of seismic remediation for Tuttle Creek Dam in east central Kansas, a seismic finite difference analysis of the dam was performed using the software FLAC and the UBCSAND and UBCTOT soil constitutive models. The FLAC software has a key advantage because it can use calibrated site-specific constitutive models. Earlier deformation analyses using a hyperbolic constitutive model for the foundation fine-grained materials did not properly represent the modulus and strength reduction and predicted extremely large permanent deformations. Cyclic triaxial laboratory tests using high-quality samples and in situ vane shear tests were used to calibrate the FLAC constitutive model herein. The resulting FLAC analysis of the unremediated dam predicted an upstream slope toe deformation of about 0.6 m, a crest settlement of about 0.6 m, and a downstream slope toe deformation of about 1.5 m using the design ground motion. Based on the estimated permanent deformations and other factors, it was decided that the anticipated upstream slope and crest deformations were tolerable and only the downstream slope had to be remediated to protect the downstream seepage control system.

Seismic deformation analysis of a rockfill dam with a bituminous concrete core

2010 ◽  
Vol 10 ◽  
pp. 012106 ◽  
Author(s):  
Behrooz Ghahreman Nejad ◽  
Phillip Soden ◽  
Hossein Taiebat ◽  
Steve Murphy
Keyword(s):  
Deformation Analysis ◽  
Concrete Core ◽  
Rockfill Dam ◽  
Seismic Deformation ◽  
Bituminous Concrete

scholarly journals Reliability-Based Seismic Deformation Analysis of Reinforced Soil Slopes

2006 ◽  
Vol 46 (4) ◽  
pp. 477-490 ◽  
Author(s):  
Masahiro Shinoda ◽  
Katsumi Horii ◽  
Toyoji Yonezawa ◽  
Masaru Tateyama ◽  
Junichi Koseki
Keyword(s):  
Reinforced Soil ◽  
Deformation Analysis ◽  
Soil Slopes ◽  
Seismic Deformation

scholarly journals New study on the 1941 Gloria Fault earthquake and tsunami

2016 ◽  
Vol 16 (8) ◽  
pp. 1967-1977 ◽  
Author(s):  
Maria Ana Baptista ◽  
Jorge Miguel Miranda ◽  
Josep Batlló ◽  
Filipe Lisboa ◽  
Joaquim Luis ◽  
...  
Keyword(s):  
Waveform Inversion ◽  
Plate Boundary ◽  
Surface Displacement ◽  
Tsunami Source ◽  
Ne Atlantic ◽  
Strait Of Gibraltar ◽  
Atlantic Basin ◽  
Seismological Data ◽  
Tsunami Waveforms ◽  
Seismic Deformation

Abstract. The M ∼ 8.3–8.4 25 November 1941 was one of the largest submarine strike-slip earthquakes ever recorded in the Northeast (NE) Atlantic basin. This event occurred along the Eurasia–Nubia plate boundary between the Azores and the Strait of Gibraltar. After the earthquake, the tide stations in the NE Atlantic recorded a small tsunami with maximum amplitudes of 40 cm peak to through in the Azores and Madeira islands. In this study, we present a re-evaluation of the earthquake epicentre location using seismological data not included in previous studies. We invert the tsunami travel times to obtain a preliminary tsunami source location using the backward ray tracing (BRT) technique. We invert the tsunami waveforms to infer the initial sea surface displacement using empirical Green's functions, without prior assumptions about the geometry of the source. The results of the BRT simulation locate the tsunami source quite close to the new epicentre. This fact suggests that the co-seismic deformation of the earthquake induced the tsunami. The waveform inversion of tsunami data favours the conclusion that the earthquake ruptured an approximately 160 km segment of the plate boundary, in the eastern section of the Gloria Fault between −20.249 and −18.630° E. The results presented here contribute to the evaluation of tsunami hazard in the Northeast Atlantic basin.

Newmark Seismic Deformation Analysis for Geosynthetic Covers

1998 ◽  
Vol 5 (1-2) ◽  
pp. 237-264 ◽  
Author(s):  
N. Matasovic ◽  
E. Kavazanjian ◽  
J.P. Giroud
Keyword(s):  
Deformation Analysis ◽  
Seismic Deformation

A RHEOLOGICAL MODEL OF POST-SEISMIC RESPONSE DUE TO 2004 SUMATRA-ANDAMAN EARTHQUAKE: CONTRIBUTION FROM LOW VISCOSITY LITHOSPHERE

2009 ◽  
Vol 03 (01) ◽  
pp. 25-34 ◽  
Author(s):  
C. D. REDDY ◽  
SANJAY K. PRAJAPATI ◽  
TERUYUKI KATO
Keyword(s):  
Seismic Response ◽  
Crustal Deformation ◽  
Upper Mantle ◽  
Far Field ◽  
Sumatra Earthquake ◽  
Low Viscosity ◽  
Viscoelastic Modeling ◽  
Seismic Deformation ◽  
Continuous Gps ◽  
Andaman Earthquake

The Sumatra earthquake on December 26, 2004 provided an excellent opportunity to investigate the post-seismic crustal deformation and thereby understand the rheology of the crust and mantle. Subsequent to this earthquake, we monitored the post-seismic deformation at strategically located five continuous GPS sites in Andaman and Nicobar region. The post-seismic transients are obtained and the viscoelastic modeling has been carried out. Post-seismic flow below a depth of 55–60 km with low viscosity of the order of 1019 Pa S can explain observed far field motion. There is also a contribution from upper mantle to post-seismic deformation which follows power law rheology. These results lead us to infer that the Sumatra-Andaman mechanical lithosphere is about at ~55 km depth.

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