Open and almost shut case for explosive eruptions: Vent processes determined by SO2 emission rates at Karymsky volcano, Kamchatka

Abstract

Research Article| December 01, 2002 Open and almost shut case for explosive eruptions: Vent processes determined by SO2 emission rates at Karymsky volcano, Kamchatka Tobias P. Fischer; Tobias P. Fischer 1Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131-1116, USA Search for other works by this author on: GSW Google Scholar Kurt Roggensack; Kurt Roggensack 2Department of Geological Sciences, Arizona State University, Tempe, Arizona 85287-1404, USA Search for other works by this author on: GSW Google Scholar Philip R. Kyle Philip R. Kyle 3Department of Earth and Environmental Science, New Mexico Tech, Socorro, New Mexico 87801, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Tobias P. Fischer 1Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131-1116, USA Kurt Roggensack 2Department of Geological Sciences, Arizona State University, Tempe, Arizona 85287-1404, USA Philip R. Kyle 3Department of Earth and Environmental Science, New Mexico Tech, Socorro, New Mexico 87801, USA Publisher: Geological Society of America Received: 23 May 2002 Revision Received: 26 Aug 2002 Accepted: 28 Aug 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (12): 1059–1062. https://doi.org/10.1130/0091-7613(2002)030<1059:OAASCF>2.0.CO;2 Article history Received: 23 May 2002 Revision Received: 26 Aug 2002 Accepted: 28 Aug 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Tobias P. Fischer, Kurt Roggensack, Philip R. Kyle; Open and almost shut case for explosive eruptions: Vent processes determined by SO2 emission rates at Karymsky volcano, Kamchatka. Geology 2002;; 30 (12): 1059–1062. doi: https://doi.org/10.1130/0091-7613(2002)030<1059:OAASCF>2.0.CO;2 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 Vent processes were examined at Karymsky volcano, Kamchatka, by measuring SO2 emissions using a correlation spectrometer (COSPEC). Continuous high-sensitivity COSPEC measurements and physical observations were collected on 11 and 12 September 1999, when Karymsky was producing small ashy eruptions every 5–20 min. Each eruptive event began with an explosion and audible rumbling (lasting ∼30 s) followed in some cases by audible chugging (lasting to 2 min). Gas plumes accompanied each event, and almost without exception the plumes dissipated and became invisible despite significant SO2 emissions. Variations in SO2 output show distinctive patterns that correlate with eruption activity. Maximum SO2 output occurred following each explosion and then declined rapidly to low, but detectable levels. In contrast, a second type of event, often associated with audible chugging, was characterized by high SO2 output long after the initial ash blast. Variations in degassing at Karymsky can be explained by secondary boiling, gas-pressure accumulation, and vent resealing. We developed a new application of the COSPEC technique to study the dynamic vent processes of erupting volcanoes. This application provides insights into the processes that occur at the otherwise inaccessible vents of erupting volcanoes particularly when a volcano changes from passive degassing and small explosions to degassing patterns that may precede a larger and more dangerous eruption. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.