Deep structure of the Racha earthquake source zone from seismic tomography data

Arefiev, S. S.; Рогожин, Е. А.; Быкова, В. В.; Dorbath, Catherine

doi:10.1134/s1069351306010034

Cited by 18 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is noteworthy that the GPS measurements on the southern slope of the Greater Caucasus in the early 1990s demonstrated southward horizontal displace ments of the fold system toward the Georgian Block. In line with these results, the seismic displacements in the Racha 1990 earthquake source appeared as a low angle thrust of the southern slope over the Transcauca sus Median Mass [1,10]. In other words, active folding in the northern and southern limbs of meganticlino rium indicates general compression of the fold edifice.…”

Section: Discussionmentioning

confidence: 56%

Velocities of contemporary movements of the Northern Caucasus estimated from GPS observations

et al. 2015

Self Cite

View full text Add to dashboard Cite

The velocity field of the Northern Caucasus based on the results of observations at the Northern Caucasus Geodetic Network (NCGN) stations is represented in the paper. Appreciable horizontal displace ment to the northeast with velocity of 26-28 mm/yr relative to the International Terrestrial Reference Frame (ITRF2008) is established. General shortening of the region at a rate of 1-2 mm/yr relative to fixed Eurasia is a source of the contemporary geological and seismic activity in the boundary zone between the Caucasus and the East European Platform.

show abstract

Section: Discussionmentioning

confidence: 56%

Velocities of contemporary movements of the Northern Caucasus estimated from GPS observations

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…Along the surface of the Paleozoic crystal line basement beneath the Alpine complex of the southern Chiauri zone, there is a narrow low velocity pocket (thickness of ~3 km), gently dipping in the northerly direction (at an angle of 5°-15°). This flat dipping tectonic zone between the sedimentary cover and the Georgia terrane basement had already been identified with the seismotomographic model of the Racha earthquake zone in 1991 [1].…”

supporting

confidence: 59%

New data on the deep structure, tectonics, and geodynamics of the Greater Caucasus

et al. 2015

Self Cite

View full text Add to dashboard Cite

“…Therefore, the model presents a simple single rupture pattern. Based on observations of separate clusters of aftershocks (Arefiev et al, 2006), a model with three complex subsources was created (Vakarchuk et al, 2013). Two subsources rep-5 resent a thrust type of motion.…”

Section: Interactive Discussionmentioning

confidence: 99%

“…hypothesized that the Racha ridge 5 region (the Greater Caucasus mountains) is a consequence of repeated earthquakes (Triep and Abets, 1995). On 29 April 1991, a major earthquake (M w = 7.0) occurred along a blind thrust fault, causing severe damage to infrastructure and triggering other hazards, such as landslides and rock falls (Arefiev et al, 2006;Jibson et al, 1994). On 7 September 2009, a smaller earthquake (M w = 6.0) occurred in the same region.…”

Section: Introductionmentioning

confidence: 99%

InSAR observations of the 2009 Racha earthquake, the Republic Georgia

Nikolaeva

Walter

2015

Preprint

View full text Add to dashboard Cite

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion AbstractCentral Georgia is an area strongly affected by earthquake and landslide hazards. On 29 April 1991 a major earthquake (M w = 7.0) struck the Racha region in the republic Georgia, followed by aftershocks and significant afterslip. The same region was hit by another major event (M w = 6.0) on 7 September 2009. The aim of the study reported 5 15InSAR deformation is in good agreement with our model. We compared our modeled fault surface of the September 2009 with the April 1991 Racha earthquake fault surfaces, and identify the same fault or a sub-parallel fault of the same system as the origin. The patch that was active in 2009 is just adjacent to the 1991 patch, indicating a possible mainly westward propagation direction, with important implications for future 20 earthquake hazards. Abstract Introduction Conclusions ReferencesTables NHESSD 3,[4695][4696][4697][4698][4699][4700][4701][4702][4703][4704][4705][4706][4707][4708][4709][4710][4711][4712][4713][4714] 2015 Abstract Introduction Conclusions ReferencesTables scales (Gracheva and Golyeva , 2010; Jibson et al., 1991; Nikolaeva et al., 2013). 3,[4695][4696][4697][4698][4699][4700][4701][4702][4703][4704][4705][4706][4707][4708][4709][4710][4711][4712][4713][4714] 2015 Abstract Introduction Tables 3, 4695-4714, 2015 Abstract Introduction 4698 NHESSD Conclusions References Conclusions ReferencesTables NHESSD 3,[4695][4696][4697][4698][4699][4700][4701][4702][4703][4704][4705][4706][4707][4708][4709][4710][4711][4712][4713][4714] 2015 Abstract Introduction Tables 25 et al. , 1997;Vakarchuk et al., 2013). 3,[4695][4696][4697][4698][4699][4700][4701][4702][4703][4704][4705][4706][4707][4708][4709][4710][4711][4712][4713][4714] 2015 Abstract Introduction Tables 3, 4695-4714, 2015 Abstract Introduction Tables 4705 NHESSD 3 , 4695-4714, 2015 Conclusions References 4703 NHESSD Conclusions References Conclusions References

show abstract

Deep structure of the Racha earthquake source zone from seismic tomography data

Cited by 18 publications

References 2 publications

Velocities of contemporary movements of the Northern Caucasus estimated from GPS observations

Velocities of contemporary movements of the Northern Caucasus estimated from GPS observations

New data on the deep structure, tectonics, and geodynamics of the Greater Caucasus

InSAR observations of the 2009 Racha earthquake, the Republic Georgia

Contact Info

Product

Resources

About