Imperial College London
Portrait Picture

Prof Jenny Collier

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Marine Geophysics
 
 
 
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Contact

 

+44 (0)20 7594 6443jenny.collier CV

 
 
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Location

 

4.46Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Allen:2018:10.1002/2017GC007270,
author = {Allen, RW and Berry, C and Henstock, T and Collier, JS and Dondin, FJ-Y and Rietbrock, A and Latchman, JL and Robertson, REA},
doi = {10.1002/2017GC007270},
journal = {G3: Geochemistry, Geophysics, Geosystems},
pages = {715--731},
title = {30 years in the life of an active submarine volcano: A time-lapse bathymetry study of the Kick-‘em-Jenny Volcano, Lesser Antilles},
url = {http://dx.doi.org/10.1002/2017GC007270},
volume = {19},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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 8km 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 datasets spanning 30 years we present a clearer picture of the development of KeJ through time. Processed grids with a cell size of 5m and vertical precision on the order of 1-4m allow us to correlate T-phase episodes with morphological changes at the volcano's edifice. In the time-period of observation 7.09x106 m3 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.
AU  - Allen,RW
AU  - Berry,C
AU  - Henstock,T
AU  - Collier,JS
AU  - Dondin,FJ-Y
AU  - Rietbrock,A
AU  - Latchman,JL
AU  - Robertson,REA
DO  - 10.1002/2017GC007270
EP  - 731
PY  - 2018///
SN  - 1525-2027
SP  - 715
TI  - 30 years in the life of an active submarine volcano: A time-lapse bathymetry study of the Kick-‘em-Jenny Volcano, Lesser Antilles
T2  - G3: Geochemistry, Geophysics, Geosystems
UR  - http://dx.doi.org/10.1002/2017GC007270
UR  - http://hdl.handle.net/10044/1/57046
VL  - 19
ER  -
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