Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes
The August 2012 to October 2013 White Island unrest sequence included 5 explosive volcanic eruptions and emplacement of a small dome. These events were linked to an overall increase in SO2 and H2S gas flux and RSAM seismic tremor which began in late 2011. Prior to this unrest, a small swarm of 25 ev...
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ftunivcolldublin:oai:researchrepository.ucd.ie:10197/9121 2023-05-15T18:43:36+02:00 Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes Jolly, Arthur Lokmer, Ivan Thun, Johannes Salichon, J. Fry, B. Chardot, L. 2017-12-19T12:52:08Z http://hdl.handle.net/10197/9121 https://doi.org/10.1016/j.jvolgeores.2017.06.006 en eng Elsevier Journal of Volcanology and Geothermal Research http://hdl.handle.net/10197/9121 343 1 75 94 doi:10.1016/j.jvolgeores.2017.06.006 This is the author’s version of a work that was accepted for publication in Journal of Volcanology and Geothermal Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in the Journal of Volcanology and Geothermal Research (343, (2017)) https://doi.org/10.1016/j.jvolgeores.2017.06.006 https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ CC-BY-NC-ND Volcano seismology Waveform inversion Volcanic gases Numerical modelling Journal Article 2017 ftunivcolldublin https://doi.org/10.1016/j.jvolgeores.2017.06.006 2022-04-08T14:19:06Z The August 2012 to October 2013 White Island unrest sequence included 5 explosive volcanic eruptions and emplacement of a small dome. These events were linked to an overall increase in SO2 and H2S gas flux and RSAM seismic tremor which began in late 2011. Prior to this unrest, a small swarm of 25 events was observed on 19–21 August 2011 and captured on a temporary seismic array including 14 broadband sensors. Each event comprised coupled pulses having distinct high frequency (HF = 2–5 Hz), long-period (LP = 0.5–1.1 Hz) and very long period (VLP = 0.03–0.125 Hz or 8–30 s) earthquakes. For each coupled event, we compute the source locations, origin times and related uncertainties by application of standard arrival time locations for the HF earthquakes and waveform semblance for the LP and VLP earthquakes. Results suggest that the events are centred beneath the active vent at depths generally < 1.5 km. The HF and LP earthquakes have shallow depths (< 1 km), while VLP have slightly deeper source locations (0.8–1.5 km). Emergent onsets for LP and VLP sources make an analysis of the absolute origin times problematic but waveform matching of VLP to LP and HF components suggests that the main VLP pulse precedes the HF and LP source processes. Waveform inversion for the VLP source is consistent with the rupture of a high angle East-West oriented crack opening either in a purely tensile or shear-tensile manner. The moment of the isotropic component is estimated at 1.2 × 1012 Nm and the corresponding volumetric change is in the range 145–450 m3. Results are interpreted as an upward migration of fluids which first excite the VLP from a high angle crack in the magma carapace followed by the excitation of LP and HF source processes in the overlying hydrothermal system European Commission - Seventh Framework Programme (FP7) Ministry of Business, Innovation and Employment (MBIE) Earthquake Commission (EQC) Article in Journal/Newspaper White Island University College Dublin: Research Repository UCD White Island ENVELOPE(48.583,48.583,-66.733,-66.733) Journal of Volcanology and Geothermal Research 343 75 94 |
institution |
Open Polar |
collection |
University College Dublin: Research Repository UCD |
op_collection_id |
ftunivcolldublin |
language |
English |
topic |
Volcano seismology Waveform inversion Volcanic gases Numerical modelling |
spellingShingle |
Volcano seismology Waveform inversion Volcanic gases Numerical modelling Jolly, Arthur Lokmer, Ivan Thun, Johannes Salichon, J. Fry, B. Chardot, L. Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes |
topic_facet |
Volcano seismology Waveform inversion Volcanic gases Numerical modelling |
description |
The August 2012 to October 2013 White Island unrest sequence included 5 explosive volcanic eruptions and emplacement of a small dome. These events were linked to an overall increase in SO2 and H2S gas flux and RSAM seismic tremor which began in late 2011. Prior to this unrest, a small swarm of 25 events was observed on 19–21 August 2011 and captured on a temporary seismic array including 14 broadband sensors. Each event comprised coupled pulses having distinct high frequency (HF = 2–5 Hz), long-period (LP = 0.5–1.1 Hz) and very long period (VLP = 0.03–0.125 Hz or 8–30 s) earthquakes. For each coupled event, we compute the source locations, origin times and related uncertainties by application of standard arrival time locations for the HF earthquakes and waveform semblance for the LP and VLP earthquakes. Results suggest that the events are centred beneath the active vent at depths generally < 1.5 km. The HF and LP earthquakes have shallow depths (< 1 km), while VLP have slightly deeper source locations (0.8–1.5 km). Emergent onsets for LP and VLP sources make an analysis of the absolute origin times problematic but waveform matching of VLP to LP and HF components suggests that the main VLP pulse precedes the HF and LP source processes. Waveform inversion for the VLP source is consistent with the rupture of a high angle East-West oriented crack opening either in a purely tensile or shear-tensile manner. The moment of the isotropic component is estimated at 1.2 × 1012 Nm and the corresponding volumetric change is in the range 145–450 m3. Results are interpreted as an upward migration of fluids which first excite the VLP from a high angle crack in the magma carapace followed by the excitation of LP and HF source processes in the overlying hydrothermal system European Commission - Seventh Framework Programme (FP7) Ministry of Business, Innovation and Employment (MBIE) Earthquake Commission (EQC) |
format |
Article in Journal/Newspaper |
author |
Jolly, Arthur Lokmer, Ivan Thun, Johannes Salichon, J. Fry, B. Chardot, L. |
author_facet |
Jolly, Arthur Lokmer, Ivan Thun, Johannes Salichon, J. Fry, B. Chardot, L. |
author_sort |
Jolly, Arthur |
title |
Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes |
title_short |
Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes |
title_full |
Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes |
title_fullStr |
Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes |
title_full_unstemmed |
Insights into fluid transport mechanisms at White Island from analysis of coupled very long-period (VLP), long-period (LP) and high-frequency (HF) earthquakes |
title_sort |
insights into fluid transport mechanisms at white island from analysis of coupled very long-period (vlp), long-period (lp) and high-frequency (hf) earthquakes |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://hdl.handle.net/10197/9121 https://doi.org/10.1016/j.jvolgeores.2017.06.006 |
long_lat |
ENVELOPE(48.583,48.583,-66.733,-66.733) |
geographic |
White Island |
geographic_facet |
White Island |
genre |
White Island |
genre_facet |
White Island |
op_relation |
Journal of Volcanology and Geothermal Research http://hdl.handle.net/10197/9121 343 1 75 94 doi:10.1016/j.jvolgeores.2017.06.006 |
op_rights |
This is the author’s version of a work that was accepted for publication in Journal of Volcanology and Geothermal Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in the Journal of Volcanology and Geothermal Research (343, (2017)) https://doi.org/10.1016/j.jvolgeores.2017.06.006 https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2017.06.006 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
343 |
container_start_page |
75 |
op_container_end_page |
94 |
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1766234023455096832 |