Deformation of the North American plate interior from a decade of continuous GPS measurements

Calais, E.; Han, Jen-Yu; DeMets, Charles; Nocquet, Jean‐Mathieu

doi:10.1029/2005jb004253

Cited by 183 publications

(171 citation statements)

References 55 publications

(99 reference statements)

Supporting

Mentioning

148

Contrasting

Unclassified

Order By: Relevance

“…From literature on geodetic solutions, we selected purely GPS solutions only. The pole and rate of Calais et al [2006c] are estimated from several hundred stations to the south of the Hudson Bay, chosen far from the center of the glacial isostatic adjustment (GIA) over the Hudson Bay. All other solutions are based on a much smaller set of stations not necessarily far from the GIA center.…”

Section: Conclusion and Summarymentioning

confidence: 99%

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

Коган¹,

Steblov²

2008

J. Geophys. Res.

View full text Add to dashboard Cite

[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.

show abstract

Section: Conclusion and Summarymentioning

confidence: 99%

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

Коган¹,

Steblov²

2008

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…For example, GPS measurements suggest that horizontal deformation across North America east of the Rocky Mountains amounts to $ 1 mm yr À1 ( 1 nanostrain yr À1 ), which is dominated by subtle deformation associated with Holocene glacial isostatic rebound [Calais et al, 2006;Sella et al, 2007]. Geodetic evidence for localized accelerated deformation in the epicentral region of three 1811 -1812 M > 7 New Madrid earthquakes continues to be debated [Calais et al, 2006;Smalley et al, 2005]. Estimates of intraplate strain across India from early campaign-mode GPS data [Paul et al, 2001] and historic seismic moment release [Bird and Liu, 2000;Rao, 2000] suggest deformation at 2 -7 nanostrain yr À1 (northsouth shortening) and 0.2-0.6 nanostrain yr À1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Intraplate deformation of the Indian subcontinent

Banerjee

Bürgmann

Nagarajan

et al. 2008

Geophysical Research Letters

220

169

View full text Add to dashboard Cite

While deformation at the Earth's surface primarily occurs along tectonic plate boundaries, major earthquakes have shaken regions deep within continental interiors. Three of the largest (M > 7.5) historic intraplate earthquakes occurred within the Indian subcontinent, suggesting the possibility of significant intraplate deformation. We consider surface velocities determined from new GPS data collected at 29 continuous GPS stations and 41 survey‐mode GPS stations in India between 1995 and 2007 to find a north‐south shortening rate of 0.3 ± 0.05 nanostrain yr−1, which may be accommodated by 2 ± 1 mm/yr of more localized convergence across central India. Southward motions at 4–7 mm/yr of sites on the Shillong plateau in northeast India reflect rapid shortening and high earthquake hazard associated with active thrust faults bounding the plateau. The width and magnitude of the elastic strain accumulation field across the Himalaya varies little from ∼76°–90° longitude, but the strain is more broadly distributed and convergence rates are higher along the eastern ∼200 km of the range.

show abstract

“…Velocities with magnitudes exceeding 1 mm/yr occur near the Great Lakes as well as to the north and east of the Great Lakes. Both Calais et al [7] and Sella et al [25] had previously identified such motion occurring near and adjacent to the Great Lakes, and they attributed this horizontal motion to glacial isostatic adjustment associated with the melting of Laurentide ice masses, which occurred more than 10,000 years ago. Horizontal velocities in this area are generally less than 2 mm/yr in magnitude and exhibit flow directed outward from Hudson Bay where the Laurentide ice mass is thought to have been thickest during the Last Glacial Maximum.…”

Section: Velocities Relative To Stable North Americamentioning

confidence: 99%

Crustal Motion Models Developed for Version 3.2 of the Horizontal Time-Dependent Positioning Utility

Snay

Freymueller

Pearson

2013

Journal of Applied Geodesy

View full text Add to dashboard Cite

Abstract. The Horizontal Time-Dependent Positioning (HTDP) software allows users to transform positional coordinates across time and between spatial reference frames. To provide this capability, the software includes numerical models for estimating interseismic horizontal crustal velocities in and around the United States, as well as numerical models for estimating the displacements associated with major (magnitude > 6.0) earthquakes in these same areas. Version 3.2 of HTDP was released in August 2012. This HTDP version introduces: (a) an improved model for estimating interseismic horizontal velocities in Alaska, (b) a model for estimating the postseismic motion associated with the M7.9 Denali Fault earthquake that occurred in central Alaska on November 3, 2002, and (c) an improved model for estimating interseismic horizontal velocities in the region of the conterminous United States, which is located east of longitude 107• W. The development and nature of these new models are discussed in this paper.

show abstract

Deformation of the North American plate interior from a decade of continuous GPS measurements

Cited by 183 publications

References 55 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

Intraplate deformation of the Indian subcontinent

Crustal Motion Models Developed for Version 3.2 of the Horizontal Time-Dependent Positioning Utility

Contact Info

Product

Resources

About