Joan L. Latchman

University of the West

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Lloyd Lynch

University of the West Indies

J. M. Kendall

University of Oxford

David Schlaphorst

University of Lisbon

Willy Aspinall

University of Bristol

Jon Blundy

University of Oxford

Richard Robertson

Caribbean Health Research Council

Elena Melekhova

University of Oxford

Brian Baptie

British Geological Survey

Frédéric Dondin

Bureau de Recherches Géologiques et Minières

Michal Camejo-Harry

University of Oxford

Cooperative Institutions

University of the West Indies

Montserrat Volcano Observatory

University of Bristol

University of the West Indies System

Centre National de la Recherche Scientifique

Institut de physique du globe de Paris

Université Paris Cité

Pennsylvania State University

British Geological Survey

University of Cambridge

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Crustal Structure Variation Along the Lesser Antilles Arc Inferred from Seismology and Petrology

EGUGA (2018)

David Schlaphorst Elena Melekhova J. M. Kendall Jon Blundy Brian Baptie

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Citations (1)

Significant technical advances in broadband seismic stations in the Lesser Antilles

Advances in geosciences (2015)

A. Anglade Arnaud Lemarchand Jean‐Marie Saurel Valérie Clouard Marie‐Paule Bouin

Abstract. In the last few years, French West Indies observatories from the Institut de Physique du Globe de Paris (IPGP), in collaboration with The UWI Seismic Research Centre (SRC, University of West Indies), have modernized the Lesser Antilles Arc seismic and deformation monitoring network. 15 new, permanent stations have been installed that strengthen and expand its detection capabilities. The global network of the IPGP-SRC consortium is now composed of 20 modernized stations, all equipped with broadband seismometers, strong motion sensors, Global Positioning System (GPS) sensors and satellite communication for real-time data transfer. To enhance the sensitivity and reduce ambient noise, special efforts were made to improve the design of the seismic vault and the original Stuttgart shielding of the broadband seismometers (240 and 120s corner period). Tests were conducted for several months, involving different types of countermeasures, to achieve the highest performance level of the seismometers. GPS data, realtime and validated seismic data (only broadband) are now available from the IPGP data centre (http://centrededonnees.ipgp.fr/index.php?&lang=EN). This upgraded network feeds the Caribbean Tsunami Warning System supported by UNESCO and establishes a monitoring tool that produces high quality data for studying subduction and volcanic processes in the Lesser Antilles arc.

Seismometer

10.5194/adgeo-40-43-2015

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Citations (9)

30 years in the life of an active submarine volcano: The evolution of Kick-`em-Jenny and implications for hazard in the southern Caribbean

AGUFM (2017)

Robert Allen C. Berry T. Henstock J. Collier Frédéric Dondin

Submarine volcano

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File 4: La Soufrière volcano, St Vincent, eruption 2020–21: assessing unrest and eruptive states from limited volcano-seismic data

Figshare (2023)

Joan L. Latchman Willy Aspinall

Event durations (SSVA and SVV).

Unrest

10.6084/m9.figshare.22360973

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Attenuation of seismic waves in the Trinidad and Tobago area

Tectonophysics (1996)

Joan L. Latchman W. B. Ambeh Lloyd Lynch

Coda

Seismogram

Seismometer

Frequency dependence

10.1016/0040-1951(95)00050-x

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Citations (10)

Elevated Seismic Activity Beneath the Slumbering Morne aux Diables Volcano, Northern Dominica and the Monitoring Role of the Seismic Research Centre

AGUFM (2012)

Rob Watts Richard Robertson W. Abraham Paul Cole T. de Roche

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Fault Creep and Strain Partitioning in Trinidad‐Tobago: Geodetic Measurements, Models, and Origin of Creep

Tectonics (2019)

John Weber H. Geirsson Peter La Femina Richard Robertson Chris Churches

Abstract The expansion of geodetic networks and Earth observing systems has allowed for new understandings of continental transform faults, including the partitioning of relative plate motions between multiple active strands and fault behavior during the earthquake cycle. One important global observation is that some continental transform faults creep (i.e., slip aseismically) at a percentage of or even at the full relative plate motion rate. The Caribbean‐South American plate boundary is a right‐stepping, segmented, dextral continental transform system. We studied active faults in the Trinidad‐Tobago segment of the Caribbean‐South American plate boundary zone using a new GPS‐derived horizontal velocity field, then modeled these data using a series of simple screw dislocation models. Our best‐fit model for interseismic strain accumulation requires 13.4 ± 0.3 mm/yr of right‐lateral movement and very shallow locking (0.2 ± 0.2 km), essentially creep, across the Central Range Fault (CRF), 3.4 ± 0.3 mm/yr across the South Coast Fault south of Trinidad, and 3.5 ± 0.3 mm/yr of dextral shear on fault(s) between Trinidad and Tobago. The CRF creeps along a physical boundary between rocks associated with thermogenically generated petroleum in south and central Trinidad and rocks containing only biogenic gas to the north. Fluid (oil and gas) overpressure, in addition to weak material in the fault core, likely causes CRF creep.

Transform fault

Strain partitioning

10.1029/2019tc005530

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Citations (9)

30 Years in the Life of an Active Submarine Volcano: A Time‐Lapse Bathymetry Study of the Kick‐'em‐Jenny Volcano, Lesser Antilles

Geochemistry Geophysics Geosystems (2018)

Robert Allen C. Berry T. Henstock Jenny Collier Frédéric Dondin

Abstract Effective monitoring is an essential part of identifying and mitigating volcanic hazards. In the submarine environment this is more difficult than onshore because observations are typically limited to land‐based seismic networks and infrequent shipboard surveys. Since the first recorded eruption in 1939, the Kick‐'em‐Jenny (KeJ) volcano, located 8 km off northern Grenada, has been the source of 13 episodes of T‐phase signals. These distinctive seismic signals, often coincident with heightened body‐wave seismicity, are interpreted as extrusive eruptions. They have occurred with a recurrence interval of around a decade, yet direct confirmation of volcanism has been rare. By conducting new bathymetric surveys in 2016 and 2017 and reprocessing 4 legacy data sets spanning 30 years we present a clearer picture of the development of KeJ through time. Processed grids with a cell size of 5 m and vertical precision on the order of 1–4 m allow us to correlate T‐phase episodes with morphological changes at the volcano's edifice. In the time‐period of observation 7.09 × 10 6 m 3 of material has been added through constructive volcanism – yet 5 times this amount has been lost through landslides. Limited recent magma production suggests that KeJ may be susceptible to larger eruptions with longer repeat times than have occurred during the study interval, behavior more similar to sub‐aerial volcanism in the arc than previously thought. T‐phase signals at KeJ have a varied origin and are unlikely to be solely the result of extrusive submarine eruptions. Our results confirm the value of repeat swath bathymetry surveys in assessing submarine volcanic hazards.

Extrusive

Submarine volcano

Submarine landslide

10.1002/2017gc007270

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Citations (18)

Generating Dynamic Volcanic Hazard Maps for Dominica, Lesser Antilles by Using Geophysical Data as Weights in Spatial Intensity Maps

O. George Joan L. Latchman Charles B. Connor Stephen R. McNutt L. Connor

Intensity

Hazard map

10.13140/rg.2.2.11654.88643

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