Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions
Abstract
Recent revisions to the geomagnetic time scale indicate that global plate motion model NUVEL‐1 should be modified for comparison with other rates of motion including those estimated from space geodetic measurements. The optimal recalibration, which is a compromise among slightly different calibrations appropriate for slow, medium, and fast rates of seafloor spreading, is to multiply NUVEL‐1 angular velocities by a constant, α, of 0.9562. We refer to this simply recalibrated plate motion model as NUVEL‐1A, and give correspondingly revised tables of angular velocities and uncertainties. Published work indicates that space geodetic rates are slower on average than those calculated from NUVEL‐1 by 6±1%. This average discrepancy is reduced to less than 2% when space geodetic rates are instead compared with NUVEL‐1A.
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An updated SLR analysis gives Arequipa a velocity of 20±6 mm/yr in direction 80°E relative to stable South America.
“We updated this analysis to reflect the revised NUVEL-1A model velocities [DeMets et al., 1994], obtaining a velocity for Arequipa of 20+6 mm/yr in a direction 80øE (Table 2), similar in rate and direction to the GPS result.”
From Constraints on present‐day shortening rate across the central eastern Andes from GPS data (1997) · cites this paper as DeMets et al., 1994
The plate convergence rate is 78 mm/yr.
“Surface strain for a subduction zone is modeled by imposing back slip at the plate convergence rate [78 mrn/yr; DeMets et al., 1994] to simulate the locked segment.”
From Constraints on present‐day shortening rate across the central eastern Andes from GPS data (1997) · cites this paper as DeMets et al., 1994
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Self-citationConstraints on present‐day shortening rate across the central eastern Andes from GPS data
Leffler, L., Stein, S., Mao, A., Dixon, T., Ellis, M. A., Ocola, L., & Sacks, I. S. (1997) · Geophysical Research Letters · doi:10.1029/97gl00770 · Cited by 28 · see citing works
Self-citation
- Authors
- DeMets, C., Gordon, R. G., Argus, D. F., & Stein, S.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 1994-10
- Volume
- 21
- Issue
- 20
- Pages
- 2191-2194
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2130833734
- Cited by
- 3,462
- References
- 0
- Citations by year
- 2026: 42 · 2025: 67 · 2024: 76 · 2023: 84 · 2022: 98 · 2021: 100 · 2020: 81 · 2019: 84 · 2018: 87 · 2017: 94 · 2016: 113 · 2015: 132 · 2014: 147 · 2013: 140 · 2012: 164
- FWCI
- 40.29
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geophysical Research Letters (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Geophysics › earthquake and tectonic studies
- Physical Sciences › Earth and Planetary Sciences › Geology › Geological and Geophysical Studies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Geomagnetism and Paleomagnetism Studies
- Keywords
- plate motion model, seafloor spreading rates, angular velocity, model recalibration, plate tectonics
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