Imprint of the North American plate in Siberia revealed by GPS

Steblov, G. M.; Коган, М. Н.; King, Robert W.; Scholz, Christopher H.; Bürgmann, Roland; Frolov, D. I.

doi:10.1029/2003gl017805

Cited by 65 publications

(94 citation statements)

References 20 publications

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“…[10] Several publications provide details on how to process GPS phase observations by the GAMIT/GLOBK software with the goal to estimate station positions and velocities [McClusky et al, 2003;Steblov et al, 2003;Herring, 2005;King and Bock, 2006]. Here we summarize individual steps characterizing our solution, which is based on GPS observations collected at 192 globally distributed stations ( Figure 1a and Data Set S1 of the auxiliary material 1 ).…”

Section: Derivation Of Loosely Constrained Multiyear Solutionmentioning

confidence: 99%

“…Other discrepancies require reinterpretations of plate geometries in terms of two or more smaller plates and belts of distributed deformation [Gordon et al, 1998;Bird, 2003;Horner-Johnson et al, 2007]. Nevertheless, there is evidence that the motion of some plates over the geologic timescale differs from the motion estimated geodetically over a time interval of several years [Calais et al, 2003a;Steblov et al, 2003].…”

Section: Introductionmentioning

confidence: 99%

“…[7] The model of the plate kinematics presented here addresses the problem debated since the beginning of the space geodesy, How big are disagreements between the current plate motions and the motions averaged over several million years, the ''geologic'' timescale [Argus and Heflin, 1995;Larson et al, 1997;DeMets and Dixon, 1999;Kogan et al, 2000;Beavan et al, 2002;Sella et al, 2002;Calais et al, 2003a;Steblov et al, 2003]? Some discrepancies between geodetic and geologic models were resolved due to improvements in the geologic plate model based on updated marine magnetic surveys [DeMets and Dixon, 1999;Calais et al, 2003a].…”

Section: Introductionmentioning

confidence: 99%

“…The origin of ITRF97 was placed at CF by the Helmert transformation of VLBI, SLR, and GPS solutions to best fit the velocities predicted by the geologic plate model NUVEL-1A. This definition suffers from errors in NUVEL-1A [DeMets and Calais et al, 2003b;Steblov et al, 2003]. The origins of ITRF2000 and ITRF2005 are placed at CM as sampled by SLR observations [Altamimi et al, 2002].…”

Section: Introductionmentioning

confidence: 99%

“…Variants of this approach were used in the following studies: (1) Argus et al [1999], analysis of the global VLBI and SLR solutions; (2) Steblov et al [2003], GPS solution for the motion of three plates: the North American, Eurasian, and Pacific; and (3) Argus [2007], evaluation of relative drifts of reference frames associated with different space geodetic techniques.…”

Section: Introductionmentioning

confidence: 99%

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Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Коган¹,

Steblov²

2008

J. Geophys. Res.

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[1] We present the vectors of rotation of 10 major lithospheric plates, estimated from continuous GPS observations at 192 globally distributed stations; 71 stations were selected as representing stable plate regions. All days for the period 1995.0-2007.0 were included in the analysis. In contrast to previous GPS plate models, our model is independent of international terrestrial reference frames (ITRF). The origin of our plate-consistent reference frame is the center of plate rotation (CP) rather than the center of mass of the entire Earth's system (CM) as in recent versions of ITRF. We estimate plate rotations and CP by minimizing the misfit between the horizontal velocities predicted by the plate model and the observed GPS velocities. If any version of ITRF is used as the reference frame, the drift of the ITRF origin relative to CP cannot be neglected in estimation of plate rotation vectors and plate-residual station velocities. The model of the plate kinematics presented here addresses the problem debated since the beginning of the space geodesy: how big are disagreements between the current plate motions and the motions averaged over several million years? We compare the vectors of relative plate rotations estimated here with the published vectors from GPS and geologic models. We also discuss the integrity of individual plates as exhibited by plate-residual station velocities. For seven largest plates, the RMS value of plate-residual station velocities in stable plate interiors is 0.5-0.9 mm/a; this value is an upper bound on deviation of real plates from infinite stiffness.

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Section: Derivation Of Loosely Constrained Multiyear Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Коган¹,

Steblov²

2008

J. Geophys. Res.

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Plate coupling and strain in the far western Aleutian arc modeled from GPS data

Коган

Frolov

Vasilenko

et al. 2017

Geophysical Research Letters

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The Aleutian and Kuril‐Kamchatka arcs meet at a triple junction of the Pacific (PAC), Bering (BER), and North American (NAM) plates. We invert GPS observations from the westernmost Aleutian (Komandorsky) Islands and Kamchatka for the fault locking depth and block motion in the far western Aleutian transform boundary. Three boundary models were considered: (1) only the Aleutian thrust fault without a trench‐normal component, (2) only a strike‐slip fault in the back arc north of the Komandorsky Islands, and (3) a rigid Komandorsky sliver bounded by the Aleutian and back‐arc faults. Observed velocities prefer Model 3, with a secular westward sliver velocity of 51 mm/a relative to NAM (two thirds of the total PAC‐NAM motion). The observed velocities are ~10% slower because of elastic strain from boundary faults. The best fitting locking depth of faults bounding the sliver is 12 km, which is similar to depths observed in diverse tectonic environments.

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Research on Characteristics of Present‐Day Crustal Motion and Deformation in Kamchatka Area

Meng

Shen

Смирнов

et al. 2009

Chinese J of Geophysics

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We have collected GPS data in the period of 1995~2005 in Kamchatka, Russia to study the presentday crustal horizontal motion in this area. Strain rate components are computed in a spherical coordinate system. Analyses to the spatial distribution of strain rate fields derived from GPS measurements are carried out in comparison with seismological and geological researches. Results show that microplate boundaries are not clear in the northern Kamchatka peninsula. GPS site velocities in the southern Kamchatka peninsula are generally greater than those in the middle and north of this area. The closer to the eastern subduction zone GPS sites are, the greater their velocities are. The horizontal velocity field obviously exhibits a decrease westward across the peninsula. Generally horizontal motions have the same direction as the Pacific plate subduction zone in this region. All strain rate components are characterized by decreasing westward. The Kamchatka peninsula is undergoing compression in terms of EW and NS strain rate components, with extension in certain local portions. Dilation rates show that the Kamchatka peninsula is under compression. Rigidity rotation rates show that this region is experiencing clockwise motion, especially in the northern zone and southern end. Effective strain rates in the eastern zone are greater than those in the west, and it exhibits a remarkable westward decrease. Principal compression strain rates are apparently greater than principal extension strain rates, especially in the eastern zone. In general, directions of principal compressive strain rates are congruent with horizontal projections of principal compressive axes derived from medium and large earthquakes. The spatial non‐uniform crustal deformation field is associated with the subduction depth, orientation, dipping angle and coupling strength of the boundary interface between the Pacific and North American plates beneath the southeastern Kamchatka peninsula.

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Imprint of the North American plate in Siberia revealed by GPS

Cited by 65 publications

References 20 publications

Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Current global plate kinematics from GPS (1995–2007) with the plate‐consistent reference frame

Plate coupling and strain in the far western Aleutian arc modeled from GPS data

Research on Characteristics of Present‐Day Crustal Motion and Deformation in Kamchatka Area

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