GPS measurements of crustal deformation in the Baikal‐Mongolia area (1994–2002): Implications for current kinematics of Asia

Calais, E.; Vergnolle, Mathilde; Sankov, V. A.; Лухнев, А. В.; Miroshnitchenko, Andrei; Amarjargal, Sharavyn; Déverchère, Jacques

doi:10.1029/2002jb002373

Cited by 239 publications

(297 citation statements)

References 52 publications

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“…The complex spatiotemporal occurrence of large earthquakes is not unique to North China; similar behavior is observed in other midcontinents such as the central and eastern United States, Australia, and northwest Europe [Calais et al, 2003;Camelbeeck et al, 2007;Clark and McCue, 2003;Newman et al, 1999]. These earthquake patterns reflect fundamental differences between midcontinent earthquakes and those at plate boundaries .…”

Section: Implications For Earthquake Hazards In Midcontinentsmentioning

confidence: 87%

Roaming earthquakes in China highlight midcontinental hazards

Liu

Wang

2012

EoS Transactions

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Before dawn on 28 July 1976, a magnitude (M) 7.8 earthquake struck Tangshan, a Chinese industrial city only 150 kilometers from Beijing (Figure 1a). In a brief moment, the earthquake destroyed the entire city and killed more than 242,000 people [Chen et al., 1988]. More than 30 years have passed, and upon the ruins a new Tangshan city has been built. However, the memory of devastation remains fresh. For this reason, a sequence of recent small earthquakes in the Tangshan region, including an M 4.8 event on 28 May and an M 4.0 event on 18 June 2012, has caused widespread concerns and heated debate in China. In the science community, the debate is whether the recent Tangshan earthquakes are the aftershocks of the 1976 earthquake despite the long gap in time since the main shock or harbingers of a new period of active seismicity in Tangshan and the rest of North China, where seismic activity seems to fluctuate between highs and lows over periods of a few decades [Ma, 1989].

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Section: Implications For Earthquake Hazards In Midcontinentsmentioning

confidence: 87%

Roaming earthquakes in China highlight midcontinental hazards

Liu

Wang

2012

EoS Transactions

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“…This area has a significantly different motion from that of the Eurasia plate defined by Calais et al (2003) ∼8 mm/yr in the N117…”

Section: Resultsmentioning

confidence: 99%

Contemporary horizontal crustal movement estimation for northwestern Vietnam inferred from repeated GPS measurements

et al. 2013

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We present a horizontal velocity field determined from a GPS network with 22 sites surveyed from 2001 to 2012 in northwestern Vietnam. The velocity is accurately estimated at each site by fitting a linear trend to each coordinate time series, after accounting for coseismic displacements caused by the 2004 Sumatra and the 2011 Tohoku earthquakes using static fault models. Considering the coseismic effects of the earthquakes, the motion of northwestern Vietnam is 34.3 ± 0.7 mm/yr at an azimuth of N108• ± 0.7• E in ITRF2008. This motion is close to, but slightly different from, that of the South China block. The area is in a transition zone between this block, the Sundaland block, and the Baoshan sub-block. At the local scale, a detailed estimation of the crustal deformation across major fault zones is geodetically revealed for the first time. We identify a locking depth of 15.3 ± 9.8 km with an accumulating left-lateral slip rate of 1.8 ± 0.3 mm/yr for the Dien Bien Phu fault, and a shallow locking depth with a right-lateral slip rate of 1.0 ± 0.6 mm/yr for the Son La and Da River faults.

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“…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%

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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GPS measurements of crustal deformation in the Baikal‐Mongolia area (1994–2002): Implications for current kinematics of Asia

Cited by 239 publications

References 52 publications

Roaming earthquakes in China highlight midcontinental hazards

Roaming earthquakes in China highlight midcontinental hazards

Contemporary horizontal crustal movement estimation for northwestern Vietnam inferred from repeated GPS measurements

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

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