Charles DeMets
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View article: Changes in Motion of the Nazca/Farallon Plate Over the Last 34 Million Years: Implications for Flat‐Slab Subduction and the Propagation of Plate Kinematic Changes
Changes in Motion of the Nazca/Farallon Plate Over the Last 34 Million Years: Implications for Flat‐Slab Subduction and the Propagation of Plate Kinematic Changes Open
A high‐resolution sequence of finite‐rotation solutions spanning the past 34 Myr for the Nazca plate relative to the Pacific, Antarctic, and South American plates shows a pattern of 1–5‐Myr‐long intervals of nearly constant plate motion mo…
View article: The 28 January 2020, Mw7.7, Cayman Trough / Oriente Fault, Supershear Earthquake Rupture
The 28 January 2020, Mw7.7, Cayman Trough / Oriente Fault, Supershear Earthquake Rupture Open
The largest magnitude strike-slip event of the instrumental seismology era along the northern Caribbean plate boundary, with a moment magnitude of 7.7, occurred on 28 January 2020 on the Oriente transform fault, along the northern edge of …
View article: Investigating continental-scale deformation and fault coupling in northern central America (Guatemala, El Salvador, Honduras) using Sentinel-1 InSAR 
Investigating continental-scale deformation and fault coupling in northern central America (Guatemala, El Salvador, Honduras) using Sentinel-1 InSAR  Open
Tectonic deformation in northern Central America, driven by the interactions between the Cocos, Caribbean, and North America plates, is accommodated by the Motagua and Polochic left-lateral faults, grabens located south of the Motagua Faul…
View article: Large Scale Observations and Modeling of Strain Partitioning in Guatemala from SAR Interferometry.
Large Scale Observations and Modeling of Strain Partitioning in Guatemala from SAR Interferometry. Open
The zone of interaction between the Cocos (CO), Caribbean (CA) and North America (NA) plates in Guatemala is defined by the sub-parallel Motagua and Polochic strike-slip faults, a series of north-south-trending extensional grabens immediat…
View article: GPS-derived interseismic fault locking along the Jalisco–Colima segment of the Mexico subduction zone
GPS-derived interseismic fault locking along the Jalisco–Colima segment of the Mexico subduction zone Open
SUMMARY Northeastward subduction of the oceanic Rivera and Cocos plates in western Mexico poses a poorly understood seismic hazard to the overlying areas of the North America plate. We estimate the magnitude and distribution of interseismi…
View article: Co-seismic and post-seismic deformation for the 1995 Colima–Jalisco and 2003 Tecomán thrust earthquakes, Mexico subduction zone, from modelling of GPS data
Co-seismic and post-seismic deformation for the 1995 Colima–Jalisco and 2003 Tecomán thrust earthquakes, Mexico subduction zone, from modelling of GPS data Open
SUMMARY We invert ∼25 yr of campaign and continuous Global Positioning System daily positions at 62 sites in southwestern Mexico to estimate co-seismic and post-seismic afterslip solutions for the 1995 Mw = 8.0 Colima–Jalisco and the 2003 …
View article: Detailed reconstructions of India-Somalia plate motion, 60 Ma to present: Implications for Somalia plate absolute motion and India-Eurasia plate motion
Detailed reconstructions of India-Somalia plate motion, 60 Ma to present: Implications for Somalia plate absolute motion and India-Eurasia plate motion Open
Summary We estimate India-Somalia plate motion at 45 times since 60 Ma from ∼9,000 crossings of Carlsberg and northern Central Indian Ridge magnetic reversals C1 to C26 and numerous fracture zone crossings. The new rotations reveal at leas…
View article: High resolution reconstructions of the Southwest Indian Ridge, 52 Ma to present: implications for the breakup and absolute motion of the Africa plate
High resolution reconstructions of the Southwest Indian Ridge, 52 Ma to present: implications for the breakup and absolute motion of the Africa plate Open
SUMMARY We reconstruct the post-52 Ma seafloor spreading history of the Southwest Indian Ridge at 44 distinct times from inversions of ≈20 000 magnetic reversal, fracture zone and transform fault crossings, spanning major regional tectonic…
View article: An integrated structural and GPS study of the Jalpatagua fault, southeastern Guatemala
An integrated structural and GPS study of the Jalpatagua fault, southeastern Guatemala Open
The Jalpatagua fault in Guatemala accommodates dextral movement of the Central America forearc. We present new global positioning system (GPS) data, minor fault analysis, geochronological analyses, and analysis of lineaments to characteriz…
View article: GPS constraints on deformation in northern Central America from 1999 to 2017, Part 2: Block rotations and fault slip rates, fault locking and distributed deformation
GPS constraints on deformation in northern Central America from 1999 to 2017, Part 2: Block rotations and fault slip rates, fault locking and distributed deformation Open
International audience
View article: GPS constraints on deformation in northern Central America from 1999 to 2017, Part 1 – Time-dependent modelling of large regional earthquakes and their post-seismic effects
GPS constraints on deformation in northern Central America from 1999 to 2017, Part 1 – Time-dependent modelling of large regional earthquakes and their post-seismic effects Open
We use continuous and campaign measurements from 215 GPS sites in northern Central America and southern Mexico to estimate coseismic and afterslip solutions for the 2009 Mw = 7.3 Swan Islands fault strike-slip earthquake and the 2012 Mw = …
View article: Reconciling geodetic and geological estimates of recent plate motion across the Southwest Indian Ridge
Reconciling geodetic and geological estimates of recent plate motion across the Southwest Indian Ridge Open
We use recently published, high-resolution reconstructions of the Southwest Indian Ridge to test whether a previously described systematic difference between Global Positioning System (GPS) and 3.16-Myr-average estimates of seafloor spread…
View article: High-resolution estimates of Nubia–Somalia plate motion since 20 Ma from reconstructions of the Southwest Indian Ridge, Red Sea and Gulf of Aden
High-resolution estimates of Nubia–Somalia plate motion since 20 Ma from reconstructions of the Southwest Indian Ridge, Red Sea and Gulf of Aden Open
Large gaps and inconsistencies remain in published estimates of Nubia–Somalia plate motion based on reconstructions of seafloor spreading data around Africa. Herein, we use newly available reconstructions of the Southwest Indian Ridge at ∼…
View article: The North American Monsoon GPS Transect Experiment 2013
The North American Monsoon GPS Transect Experiment 2013 Open
Northwestern Mexico experiences large variations in water vapor on seasonal time scales in association with the North American monsoon, as well as during the monsoon associated with upper-tropospheric troughs, mesoscale convective systems,…
View article: Satellite geodesy tools for ground subsidence and associated shallow faulting hazard assessment in central Mexico
Satellite geodesy tools for ground subsidence and associated shallow faulting hazard assessment in central Mexico Open
No abstract available.
View article: High-resolution estimates of Southwest Indian Ridge plate motions, 20 Ma to present
High-resolution estimates of Southwest Indian Ridge plate motions, 20 Ma to present Open
We present the first estimates of Southwest Indian Ridge (SWIR) plate motions at high temporal resolution during the Quaternary and Neogene based on nearly 5000 crossings of 21 magnetic reversals out to C6no (19.72 Ma) and the digitized tr…
View article: High-resolution Neogene and Quaternary estimates of Nubia-Eurasia-North America Plate motion
High-resolution Neogene and Quaternary estimates of Nubia-Eurasia-North America Plate motion Open
Reconstructions of the history of convergence between the Nubia and Eurasia plates constitute an important part of a broader framework for understanding deformation in the Mediterranean region and the closing of the Mediterranean Basin. He…
View article: Evolution of unrest at Laguna del Maule volcanic field (Chile) from InSAR and GPS measurements, 2003 to 2014
Evolution of unrest at Laguna del Maule volcanic field (Chile) from InSAR and GPS measurements, 2003 to 2014 Open
The Laguna del Maule (LdM) volcanic field in the southern volcanic zone of the Chilean Andes exhibits a large volume of rhyolitic material erupted during postglacial times (20–2 ka). Since 2007, LdM has experienced an unrest episode charac…
View article: The 2012 August 27<i>M</i><sub>w</sub>7.3 El Salvador earthquake: expression of weak coupling on the Middle America subduction zone
The 2012 August 27<i>M</i><sub>w</sub>7.3 El Salvador earthquake: expression of weak coupling on the Middle America subduction zone Open
Subduction zones exhibit variable degrees of interseismic coupling as resolved by inversions of geodetic data and analyses of seismic energy release. The degree to which a plate boundary fault is coupled can have profound effects on its se…
View article: Geodetic slip solutions for the Mw = 7.4 Champerico (Guatemala) earthquake of 2012 November 7 and its postseismic deformation
Geodetic slip solutions for the Mw = 7.4 Champerico (Guatemala) earthquake of 2012 November 7 and its postseismic deformation Open
International audience
View article: The Amazon Dense GNSS Meteorological Network: A New Approach for Examining Water Vapor and Deep Convection Interactions in the Tropics
The Amazon Dense GNSS Meteorological Network: A New Approach for Examining Water Vapor and Deep Convection Interactions in the Tropics Open
The complex interactions between water vapor fields and deep atmospheric convection remain one of the outstanding problems in tropical meteorology. The lack of high spatial–temporal resolution, all-weather observations in the tropics has h…