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• W4206170018 endingPage "426" @default.
• W4206170018 startingPage "392" @default.
• W4206170018 abstract "SUMMARY Yasur volcano, Vanuatu is a continuously active open-vent basaltic-andesite stratocone with persistent and long-lived eruptive activity. We present results from a seismo-acoustic field experiment at Yasur, providing locally dense broad-band seismic and infrasonic network coverage from 2016 July 27 to August 3. We corroborate our seismo-acoustic observations with coincident video data from cameras deployed at the crater and on an unoccupied aircraft system (UAS). The waveforms contain a profusion of signals reflecting Yasur’s rapidly occurring and persistent explosive activity. The typical infrasonic signature of Yasur explosions is a classic short-duration and often asymmetric explosion waveform characterized by a sharp compressive onset and wideband frequency content. The dominant seismic signals are numerous repetitive very-long-period (VLP) signals with periods of ∼2–10 s. The VLP seismic events are ‘high-rate’, reoccurring near-continuously throughout the data set with short interevent times (∼20–60 s). We observe variability in the synchronization of seismic VLP and acoustic sources. Explosion events clearly delineated by infrasonic waveforms are underlain by seismic VLPs. However, strong seismic VLPs also occur with only a weak infrasonic expression. Multiplet analysis of the seismic VLPs reveals a systematic progression in the seismo-acoustic source decoupling. The same dominant seismic VLP multiplet occurs with and without surficial explosions and infrasound, and these transitions occur over a timescale of a few days during our field campaign. We subsequently employ template matching, stacking, and full-waveform inversion to image the source mechanism of the dominant VLP multiplet. Inversion of the dominant VLP multiplet stack points to a composite source consisting of either a dual-crack (plus forces) or pipe-crack (plus forces) mechanism. The derived mechanisms correspond to a point-source directly beneath the summit vents with centroid depths in the range ∼900–1000 m below topography. All mechanisms suggest a northeast trending crack dipping relatively shallowly to the northwest and indicate a VLP source centroid and mechanism controlled by a stable structural geologic feature beneath Yasur. We interpret the results in the framework of gas slug ascent through the conduit responsible for Yasur explosions. The VLP mechanism and timing with infrasound (when present) are explained by a shallow-buffered top-down model in which slug ascent is relatively aseismic until reaching the base of a shallow section. Slug disruption in this shallow zone triggers a pressure disturbance that propagates downward and couples at the conduit base (VLP centroid). If the shallow section is open, an explosion propagates to the surface, producing infrasound. In the case of (the same multiplet) VLPs occurring without surficial explosions and weak or no infrasound, the decoupling of the dominant VLPs at ∼900–1000 m depth from surficial explosions and infrasound strongly indicates buffering of the terminal slug ascent. This buffering could be achieved by a variety of conditions at or directly beneath the vents, such as a high-viscosity layer of crystal-rich magma, a debris cap from backfill, a foam layer, or a combination of these. The dominant VLP at Yasur captured by our experiment has a source depth and mechanism separated from surface processes and is stable over time." @default.
• W4206170018 created "2022-01-26" @default.
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• W4206170018 date "2022-01-05" @default.
• W4206170018 modified "2023-10-14" @default.
• W4206170018 title "High-rate very-long-period seismicity at Yasur volcano, Vanuatu: source mechanism and decoupling from surficial explosions and infrasound" @default.
• W4206170018 cites W1156984659 @default.
• W4206170018 cites W1466480410 @default.
• W4206170018 cites W1490573096 @default.
• W4206170018 cites W1499918922 @default.
• W4206170018 cites W1548583688 @default.
• W4206170018 cites W1563962138 @default.
• W4206170018 cites W1569562700 @default.
• W4206170018 cites W1621391022 @default.
• W4206170018 cites W1650529252 @default.
• W4206170018 cites W1810485791 @default.
• W4206170018 cites W1897927599 @default.
• W4206170018 cites W1901321882 @default.
• W4206170018 cites W1904779006 @default.
• W4206170018 cites W1922300727 @default.
• W4206170018 cites W1966835625 @default.
• W4206170018 cites W1967875693 @default.
• W4206170018 cites W1969832215 @default.
• W4206170018 cites W1971059249 @default.
• W4206170018 cites W1974133910 @default.
• W4206170018 cites W1981065516 @default.
• W4206170018 cites W1983020197 @default.
• W4206170018 cites W1984649146 @default.
• W4206170018 cites W1986984759 @default.
• W4206170018 cites W1991378213 @default.
• W4206170018 cites W1991848959 @default.
• W4206170018 cites W1997534697 @default.
• W4206170018 cites W2000067256 @default.
• W4206170018 cites W2003586202 @default.
• W4206170018 cites W2005360984 @default.
• W4206170018 cites W2006121818 @default.
• W4206170018 cites W2007640792 @default.
• W4206170018 cites W2012135011 @default.
• W4206170018 cites W2013123131 @default.
• W4206170018 cites W2013450558 @default.
• W4206170018 cites W2016812966 @default.
• W4206170018 cites W2021995044 @default.
• W4206170018 cites W2022392561 @default.
• W4206170018 cites W2025878044 @default.
• W4206170018 cites W2030140845 @default.
• W4206170018 cites W2032137782 @default.
• W4206170018 cites W2034300128 @default.
• W4206170018 cites W2038048906 @default.
• W4206170018 cites W2040878154 @default.
• W4206170018 cites W2046128370 @default.
• W4206170018 cites W2051782287 @default.
• W4206170018 cites W2051907322 @default.
• W4206170018 cites W2055752909 @default.
• W4206170018 cites W2060050401 @default.
• W4206170018 cites W2068471746 @default.
• W4206170018 cites W2068517379 @default.
• W4206170018 cites W2071909980 @default.
• W4206170018 cites W2078429774 @default.
• W4206170018 cites W2080373522 @default.
• W4206170018 cites W2091902543 @default.
• W4206170018 cites W2107892815 @default.
• W4206170018 cites W2111497966 @default.
• W4206170018 cites W2112393517 @default.
• W4206170018 cites W2116719955 @default.
• W4206170018 cites W2122924553 @default.
• W4206170018 cites W2125501329 @default.
• W4206170018 cites W2132547391 @default.
• W4206170018 cites W2135406757 @default.
• W4206170018 cites W2137011101 @default.
• W4206170018 cites W2142635246 @default.
• W4206170018 cites W2144441990 @default.
• W4206170018 cites W2145300562 @default.
• W4206170018 cites W2150674391 @default.
• W4206170018 cites W2153761587 @default.
• W4206170018 cites W2163665050 @default.
• W4206170018 cites W2165305129 @default.
• W4206170018 cites W2167088801 @default.
• W4206170018 cites W2169429213 @default.
• W4206170018 cites W2169987296 @default.
• W4206170018 cites W2199950587 @default.
• W4206170018 cites W2279353965 @default.
• W4206170018 cites W2281375300 @default.
• W4206170018 cites W2338322480 @default.
• W4206170018 cites W2529251349 @default.
• W4206170018 cites W2544647496 @default.
• W4206170018 cites W2573107791 @default.
• W4206170018 cites W2592044898 @default.
• W4206170018 cites W2606953897 @default.

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