The relation between viscosity and acoustic emissions as a laboratory analogue for volcano seismicity

Research Article| April 15, 2019 The relation between viscosity and acoustic emissions as a laboratory analogue for volcano seismicity James Clarke; James Clarke 1Department of Physics, University of Auckland, Auckland 1142, New Zealand Search for other works by this author on: GSW Google Scholar Ludmila Adam; Ludmila Adam 2School of Environment, University of Auckland, Auckland 1142, New Zealand Search for other works by this author on: GSW Google Scholar Joel Sarout; Joel Sarout 3Commonwealth Scientific and Industrial Research Organisation (CSIRO) Energy, Perth, Western Australia 6151, Australia Search for other works by this author on: GSW Google Scholar Kasper van Wijk; Kasper van Wijk 1Department of Physics, University of Auckland, Auckland 1142, New Zealand Search for other works by this author on: GSW Google Scholar Ben Kennedy; Ben Kennedy 4Geological Sciences, University of Canterbury, Christchurch 8140, New Zealand Search for other works by this author on: GSW Google Scholar Jeremie Dautriat Jeremie Dautriat 3Commonwealth Scientific and Industrial Research Organisation (CSIRO) Energy, Perth, Western Australia 6151, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information James Clarke 1Department of Physics, University of Auckland, Auckland 1142, New Zealand Ludmila Adam 2School of Environment, University of Auckland, Auckland 1142, New Zealand Joel Sarout 3Commonwealth Scientific and Industrial Research Organisation (CSIRO) Energy, Perth, Western Australia 6151, Australia Kasper van Wijk 1Department of Physics, University of Auckland, Auckland 1142, New Zealand Ben Kennedy 4Geological Sciences, University of Canterbury, Christchurch 8140, New Zealand Jeremie Dautriat 3Commonwealth Scientific and Industrial Research Organisation (CSIRO) Energy, Perth, Western Australia 6151, Australia Publisher: Geological Society of America Received: 01 Aug 2018 Revision Received: 20 Nov 2018 Accepted: 17 Mar 2019 First Online: 15 Apr 2019 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2019 Geological Society of America Geology (2019) 47 (6): 499–503. https://doi.org/10.1130/G45446.1 Article history Received: 01 Aug 2018 Revision Received: 20 Nov 2018 Accepted: 17 Mar 2019 First Online: 15 Apr 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation James Clarke, Ludmila Adam, Joel Sarout, Kasper van Wijk, Ben Kennedy, Jeremie Dautriat; The relation between viscosity and acoustic emissions as a laboratory analogue for volcano seismicity. Geology 2019;; 47 (6): 499–503. doi: https://doi.org/10.1130/G45446.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Volcano seismicity is an important tool used to monitor volcanic hazards, as seismic signals are commonly associated with fracturing and the movement of volcanic fluids. In investigating the relation between fluids and seismic signals, we record acoustic emissions (AEs) in the laboratory that result from fracturing and fluid depressurization through the fractured rock. We vary the fluid viscosity to create field analogues of hydrothermal and magmatic fluids. While fracturing causes high-frequency volcano-tectonic (VT)–type AE signals, fluid venting results in VT and long-period AEs with variable but overall lower dominant frequencies. The viscosity of the vented fluid correlates (1) inversely with the peak dominant frequency, (2) inversely with the number of induced AEs, (3) proportionally to the onset time of AEs, and (4) inversely with the initial rate of AE generation. Tremor was observed only in the early stages of low-viscosity fluid venting and thus may be more associated with gases and hydrothermal fluids than with magma. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.