Fazio, M;
Benson, PM;
Vinciguerra, S;
(2017)
On the generation mechanisms of fluid-driven seismic signals related to volcano-tectonics.
Geophysical Research Letters
, 44
(2)
pp. 734-742.
10.1002/2016GL070919.
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Abstract
The generation mechanics of fluid-driven volcano seismic signals, and their evolution with time, remains poorly understood. We present a laboratory study aiming to better constrain the time evolution of such signals across temperature conditions 25 to 175°C in order to simulate a “bubbly liquid.” Simulations used pressures equivalent to volcanic edifices up to 1.6 km in depth using a triaxial deformation apparatus equipped with an array of acoustic emission sensors. We investigate the origin of fluid-driven seismic signals by rapidly venting the pore pressure through a characterized damage zone. During the release of water at 25°C broadband signals were generated, with frequencies ranging from 50 to 160 kHz. However, the decompression of a water/steam phase at 175°C generated a bimodal spectrum of different signals, in the range 100–160 kHz. These new results are consistent with natural signals from active volcanoes, such as Mount Etna, and highlight the role of fluid and gas phases (such as bubbly liquids) in generating different types of volcano-tectonic seismicity.
| Type: | Article |
|---|---|
| Title: | On the generation mechanisms of fluid-driven seismic signals related to volcano-tectonics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/2016GL070919 |
| Publisher version: | https://doi.org/10.1002/2016GL070919 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10098150 |
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