Relative Motion between St. Croix and the Puerto Rico-Northern Virgin Islands Block Derived from Continuous GPS Observations (1995–2014)

Liu, Hanlin; Wang, Guoquan

doi:10.1155/2015/915753

Cited by 14 publications

(8 citation statements)

References 51 publications

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“…Due to its long history and high-quality data, this site has been frequently used to represent the Caribbean plate in tectonic studies (Yang et al, in press;e. g. Mann, 2002;DeMets et al, 2007;Liu and Wang, 2015). CRO1 has a velocity of 19.17 mm year −1 and an azimuth of 75.17°with respect to SGOMRF14, which is very close to the inter-plate motions calculated from other three models.…”

Section: Inter-plate and Intraplate Motionssupporting

confidence: 72%

Introduction to the GNSS geodetic infrastructure in the Gulf of Mexico Region

Wang

2016

Survey Review

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Section: Inter-plate and Intraplate Motionssupporting

confidence: 72%

Introduction to the GNSS geodetic infrastructure in the Gulf of Mexico Region

Wang

2016

Survey Review

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“…Owing to the fact that this project is the first shield driven tunnel beneath the Hutuo River in Shijiazhuang, a significant concern regarding the riverbed deformation and tunneling safety occurred during the excavations. Based on our experiences from previous GPS monitoring projects [21][22][23][24][25], we established a GPS monitoring network with one base station (BASE) and six rover stations named GPS1, GPS2, GPS3, GPS4, GPS5, and GPS6 ( Figure 1b). The base station was installed at the headquarters of the project, about two kilometers away from the river (Figure 1a).…”

Section: Project Overviewmentioning

confidence: 99%

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

et al. 2019

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Shield tunneling under rivers often requires monitoring riverbed deformations in near real-time. However, it is challenging to measure riverbed deformation with conventional survey techniques. This study introduces a comprehensive method that uses the Global Positioning System (GPS) of the USA and the BeiDou navigation satellite system (BeiDou) of China to monitor riverbed deformation during the construction of twin tunnels beneath the Hutuo River in Shijiazhuang, China. A semi-permanent GPS network with one base station outside the river and six rover stations within the river was established for conducting near real-time and long-term monitoring. The distances between the base and the rover antennas are within two kilometers. The network was continuously operating for eight months from April to December 2018. The method is comprised of three components: (1) Monitoring the stability of the base station using precise point positioning (PPP) method, a stable regional reference frame, and a seasonal ground deformation model; (2) monitoring the relative positions of rover stations using the carrier-phase double-difference (DD) positioning method in near real-time; and (3) detecting abrupt and gradual displacements at both base and rover stations using an automated change point detection algorithm. The method is able to detect abrupt positional-changes as minor as five millimeters in near real-time and gradual positional-changes at a couple of millimeters per day within a week. The method has the flexibility of concurrent processing different GPS and BeiDou data sessions (e.g., every 15 minutes, 30 minutes, one hour, one day) for diffident monitoring purposes. This study indicates that BeiDou observations can also achieve few-millimeter-accuracy for measuring displacements. Parallel processing GPS and BeiDou observations can improve the reliability of near real-time structural deformation monitoring and minimize false alerts. The method introduced in this article can be applied to other urban areas for near real-time and long-term structural health monitoring.

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“…The southeastern margin of the relatively rigid Puerto Rico-Virgin Islands crustal block is the Anegada Rift, a normalsinistral rift separating this crust with the Lesser Antilles. This rift is estimated to be opening obliquely at >1.5 mm a −1 (Benford et al, 2012a;Liu and Wang, 2015), though some variability exists in the relative amounts of normal to sinistral motion.…”

Section: Puerto Rico and The Virgin Islandsmentioning

confidence: 99%

CCAF-DB: The Caribbean and Central American Active Fault Database

Styron¹,

García-Pelaez²,

Pagani³

2019

Preprint

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Abstract. A database of ~250 active fault traces in the Caribbean and Central American regions has been assembled to characterize the seismic hazard and tectonics of the area, as part of the GEM Foundation's Caribbean and Central American Risk Assesment (CCARA) project. The dataset is available in many vector GIS formats, and contains fault trace locations as well as attributes describing fault geometry and kinematics, slip rates, data quality and uncertainty, and other metadata as available. The data is public and open-source (available at https://github.com/GEMScienceTools/central_am_carib_faults), will be updated progressively as new data is available, and is open to community contribution. The active fault data show deformation in the region to be centered around the margins of the Caribbean plate. Northern Central America has sinistral and reverse faults north of the sinistral Motagua-Polochic Fault Zone, which accommodates sinistral Caribbean-North American relative motion. The Central American Highlands extend east-west along a broad array of normal faults, bound by the Motagua-Polochic Fault Zone in the north and dextral faulting in the southwest between the Caribbean plate and the Central American forearc. Faulting in southern Central America is complicated, with trench-parallel reverse and sinistral faults. The northern Caribbean-North American plate boundary is sinistral offshore of Central America, with transpressive stepovers through Jamaica, southern Cuba and Hispaniola. Farther east, deformation becomes more contractional closer to the Lesser Antilles subduction zone, with minor extension and sinistral shear throughout the upper plate, accommodating oblique convergence of the Caribbean and North American plates.

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Relative Motion between St. Croix and the Puerto Rico-Northern Virgin Islands Block Derived from Continuous GPS Observations (1995–2014)

Cited by 14 publications

References 51 publications

Introduction to the GNSS geodetic infrastructure in the Gulf of Mexico Region

Introduction to the GNSS geodetic infrastructure in the Gulf of Mexico Region

Detection and Monitoring of Tunneling-Induced Riverbed Deformation Using GPS and BeiDou: A Case Study

CCAF-DB: The Caribbean and Central American Active Fault Database

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