The origin of volcano-tectonic earthquake swarms

Abstract

Research Article| June 01, 2006 The origin of volcano-tectonic earthquake swarms Diana C. Roman; Diana C. Roman 1School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK Search for other works by this author on: GSW Google Scholar Katharine V. Cashman Katharine V. Cashman 2Department of Geological Sciences, 1272 University of Oregon, Eugene, Oregon 97403, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Diana C. Roman 1School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK Katharine V. Cashman 2Department of Geological Sciences, 1272 University of Oregon, Eugene, Oregon 97403, USA Publisher: Geological Society of America Received: 21 Sep 2005 Revision Received: 07 Jan 2006 Accepted: 20 Jan 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2006) 34 (6): 457–460. https://doi.org/10.1130/G22269.1 Article history Received: 21 Sep 2005 Revision Received: 07 Jan 2006 Accepted: 20 Jan 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Diana C. Roman, Katharine V. Cashman; The origin of volcano-tectonic earthquake swarms. Geology 2006;; 34 (6): 457–460. doi: https://doi.org/10.1130/G22269.1 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-tectonic (VT) seismicity is commonly recorded prior to and during eruptions. VT seismicity may reflect stresses induced by dike propagation, as indicated by propagating hypocenters and fault-plane solutions (FPS) reflecting regional stresses, or stresses induced by dike inflation, indicated by randomly distributed hypocenters and FPS with pressure axes rotated ∼90° to regional maximum compression. Although numerical models of dike-induced stresses indicate that both regimes should occur during dike emplacement, this has not yet been observed, according to published seismic data. Instead, ∼90° rotated FPS are observed in some cases, while propagating hypocenters mark dike formation in other cases. We suggest that differences in the seismic expression of upper crustal magma migration may result from differences in the regional tectonic setting and in the nature of magma–wall-rock interactions. Ultimately, it may be possible to use information contained in VT seismicity to forecast changes in a volcano's behavior by establishing the characteristic stress field response for a given volcano, or through a deeper understanding of the complex relationships between VT seismicity, local crustal stresses, and the physical mechanisms of magma migration. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.