Glacier microseismicity

Abstract

Research Article| April 01, 2010 Glacier microseismicity Michael E. West; Michael E. West 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Search for other works by this author on: GSW Google Scholar Christopher F. Larsen; Christopher F. Larsen 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Search for other works by this author on: GSW Google Scholar Martin Truffer; Martin Truffer 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Search for other works by this author on: GSW Google Scholar Shad O'Neel; Shad O'Neel 2Water Resources Division, U.S. Geological Survey, Anchorage, Alaska 99508, USA Search for other works by this author on: GSW Google Scholar Laura LeBlanc Laura LeBlanc 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Michael E. West 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Christopher F. Larsen 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Martin Truffer 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Shad O'Neel 2Water Resources Division, U.S. Geological Survey, Anchorage, Alaska 99508, USA Laura LeBlanc 1Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA Publisher: Geological Society of America Received: 10 Aug 2009 Revision Received: 25 Oct 2009 Accepted: 27 Oct 2009 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2010 Geological Society of America Geology (2010) 38 (4): 319–322. https://doi.org/10.1130/G30606.1 Article history Received: 10 Aug 2009 Revision Received: 25 Oct 2009 Accepted: 27 Oct 2009 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 Michael E. West, Christopher F. Larsen, Martin Truffer, Shad O'Neel, Laura LeBlanc; Glacier microseismicity. Geology 2010;; 38 (4): 319–322. doi: https://doi.org/10.1130/G30606.1 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 We present a framework for interpreting small glacier seismic events based on data collected near the center of Bering Glacier, Alaska, in spring 2007. We find extremely high microseismicity rates (as many as tens of events per minute) occurring largely within a few kilometers of the receivers. A high-frequency class of seismicity is distinguished by dominant frequencies of 20–35 Hz and impulsive arrivals. A low-frequency class has dominant frequencies of 6–15 Hz, emergent onsets, and longer, more monotonic codas. A bimodal distribution of 160,000 seismic events over two months demonstrates that the classes represent two distinct populations. This is further supported by the presence of hybrid waveforms that contain elements of both event types. The high-low-hybrid paradigm is well established in volcano seismology and is demonstrated by a comparison to earthquakes from Augustine Volcano. We build on these parallels to suggest that fluid-induced resonance is likely responsible for the low-frequency glacier events and that the hybrid glacier events may be caused by the rush of water into newly opening pathways. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.