Evolution of dike opening during the March 2011 Kamoamoa fissure eruption, Kīlauea Volcano, Hawai`i

DOI Web Site Web Site 被引用文献3件
  • Paul Lundgren
    Jet Propulsion Laboratory California Institute of Technology Pasadena California USA
  • Michael Poland
    Hawaiian Volcano Observatory U.S. Geological Survey Hawaiian Volcanoes National Park Hawaii USA
  • Asta Miklius
    Hawaiian Volcano Observatory U.S. Geological Survey Hawaiian Volcanoes National Park Hawaii USA
  • Tim Orr
    Hawaiian Volcano Observatory U.S. Geological Survey Hawaiian Volcanoes National Park Hawaii USA
  • Sang‐Ho Yun
    Jet Propulsion Laboratory California Institute of Technology Pasadena California USA
  • Eric Fielding
    Jet Propulsion Laboratory California Institute of Technology Pasadena California USA
  • Zhen Liu
    Jet Propulsion Laboratory California Institute of Technology Pasadena California USA
  • Akiko Tanaka
    Geological Survey of Japan AIST Tsukuba Japan
  • Walter Szeliga
    Department of Geological Sciences Central Washington University Ellensburg Washington USA
  • Scott Hensley
    Jet Propulsion Laboratory California Institute of Technology Pasadena California USA
  • Susan Owen
    Jet Propulsion Laboratory California Institute of Technology Pasadena California USA

書誌事項

公開日
2013-03
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/jgrb.50108
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The 5–9 March 2011 Kamoamoa fissure eruption along the east rift zone of Kīlauea Volcano, Hawai`i, followed months of pronounced inflation at Kīlauea summit. We examine dike opening during and after the eruption using a comprehensive interferometric synthetic aperture radar (InSAR) data set in combination with continuous GPS data. We solve for distributed dike displacements using a whole Kīlauea model with dilating rift zones and possibly a deep décollement. Modeled surface dike opening increased from nearly 1.5 m to over 2.8 m from the first day to the end of the eruption, in agreement with field observations of surface fracturing. Surface dike opening ceased following the eruption, but subsurface opening in the dike continued into May 2011. Dike volumes increased from 15, to 16, to 21 million cubic meters (MCM) after the first day, eruption end, and 2 months following, respectively. Dike shape is distinctive, with a main limb plunging from the surface to 2–3 km depth in the up‐rift direction toward Kīlauea's summit, and a lesser projection extending in the down‐rift direction toward Pu`u `Ō`ō at 2 km depth. Volume losses beneath Kīlauea summit (1.7 MCM) and Pu`u `Ō`ō (5.6 MCM) crater, relative to dike plus erupted volume (18.3 MCM), yield a dike to source volume ratio of 2.5 that is in the range expected for compressible magma without requiring additional sources. Inflation of Kīlauea's summit in the months before the March 2011 eruption suggests that the Kamoamoa eruption resulted from overpressure of the volcano's magmatic system.</jats:p>

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