@article {ISI:000351847600028,
	title = {{Long-term explosive degassing and debris flow activity at West Mata submarine volcano}},
	journal = {GEOPHYSICAL RESEARCH LETTERS},
	volume = {42},
	number = {5},
	year = {2015},
	month = {mar},
	pages = {1480{\textendash}1487},
	type = {Article},
	abstract = {West Mata is a 1200m deep submarine volcano where explosive boninite eruptions were observed in 2009. The acoustic signatures from the volcano{\textquoteright}s summit eruptive vents Hades and Prometheus were recorded with an in situ (similar to 25m range) hydrophone during ROV dives in May 2009 and with local (similar to 5km range) moored hydrophones between December 2009 and August 2011. The sensors recorded low frequency (1-40Hz), short duration explosions consistent with magma bubble bursts from Hades, and broadband, 1-5min duration signals associated with episodes of fragmentation degassing from Prometheus. Long-term eruptive degassing signals, recorded through May 2010, preceded a several month period of declining activity. Degassing episodes were not recorded acoustically after early 2011, although quieter effusive eruption activity may have continued. Synchronous optical measurements of turbidity made between December 2009 and April 2010 indicate that turbidity maxima resulted from occasional south flank slope failures triggered by the collapse of accumulated debris during eruption intervals.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {0094-8276},
	doi = {10.1002/2014GL062603},
	author = {Dziak, R P and Bohnenstiehl, D R and Baker, E T and Matsumoto, H and Caplan-Auerbach, J and Embley, R W and Merle, S G and Walker, S L and Lau, T-K. and Chadwick Jr., W W}
}
@article {Dziak2012a,
	title = {{Flux measurements of explosive degassing using a yearlong hydroacoustic record at an erupting submarine volcano}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {13},
	number = {11},
	year = {2012},
	month = {nov},
	pages = {Q0AF07},
	abstract = {The output of gas and tephra from volcanoes is an inherently disorganized process that makes reliable flux estimates challenging to obtain. Continuous monitoring of gas flux has been achieved in only a few instances at subaerial volcanoes, but never for submarine volcanoes. Here we use the first sustained (yearlong) hydroacoustic monitoring of an erupting submarine volcano (NW Rota-1, Mariana arc) to make calculations of explosive gas flux from a volcano into the ocean. Bursts of Strombolian explosive degassing at the volcano summit (520 m deep) occurred at 1{\textendash}2 min intervals during the entire 12-month hydrophone record and commonly exhibited cyclic step-function changes between high and low intensity. Total gas flux calculated from the hydroacoustic record is 5.4 {\textpm} 0.6 Tg a-1, where the magmatic gases driving eruptions at NW Rota-1 are primarily H2O, SO2, and CO2. Instantaneous fluxes varied by a factor of \~{}100 over the deployment. Using melt inclusion information to estimate the concentration of CO2 in the explosive gases as 6.9 {\textpm} 0.7 wt {\%}, we calculate an annual CO2 eruption flux of 0.4 {\textpm} 0.1 Tg a-1. This result is within the range of measured CO2 fluxes at continuously erupting subaerial volcanoes, and represents \~{}0.2{\textendash}0.6{\%} of the annual estimated output of CO2from all subaerial arc volcanoes, and \~{}0.4{\textendash}0.6{\%} of the mid-ocean ridge flux. The multiyear eruptive history of NW Rota-1 demonstrates that submarine volcanoes can be significant and sustained sources of CO2 to the shallow ocean.},
	issn = {1525-2027},
	doi = {10.1029/2012GC004211},
	author = {Dziak, R P and Baker, E T and Shaw, A M and Bohnenstiehl, D R and Chadwick, W W and Haxel, J H and Matsumoto, H and Walker, S L}
}
@article {Dziak2012,
	title = {{Seismic precursors and magma ascent before the April 2011 eruption at Axial Seamount}},
	journal = {Nature Geoscience},
	volume = {5},
	number = {7},
	year = {2012},
	month = {jul},
	pages = {478{\textendash}482},
	publisher = {NATURE PUBLISHING GROUP},
	address = {NEW YORK; 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA},
	abstract = {Volcanoes at spreading centres on land often exhibit seismicity and ground inflation months to years before an eruption, caused by a gradual influx of magma to the source reservoir1, 2, 3, 4. Deflation and seismicity can occur on time scales of hours to days, and result from the injection of magma into adjacent rift zones5, 6, 7, 8. Volcanoes at submarine rift zones, such as Axial Seamount in the northeast Pacific Ocean, have exhibited similar behaviour9, 10, 11, 12, but a direct link between seismicity, seafloor deformation and magma intrusion has never been demonstrated. Here we present recordings from ocean-bottom hydrophones and an established array of bottom-pressure recorders that reveal patterns of both microearthquakes and seafloor deformation at Axial Seamount on the Juan de Fuca Ridge, before it erupted in April 2011. Our observations show that the rate of seismicity increased steadily during a period of several years, leading up to an intrusion and eruption of magma that began on 6 April 2011. We also detected a sudden increase in seismo-acoustic energy about 2.6 h before the eruption began. Our data indicate that access to real-time seismic data, projected to be available in the near future, might facilitate short-term forecasting and provide sufficient lead-time to prepare in situ instrumentation before future intrusion and eruption events.},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {1752-0894},
	doi = {10.1038/ngeo1490},
	author = {Dziak, R P and Haxel, J H and Bohnenstiehl, D R and Chadwick, W W and Nooner, S L and Fowler, M J and Matsumoto, H and Butterfield, D A}
}
@article {Tolstoy2006,
	title = {{A sea-floor spreading event captured by seismometers}},
	journal = {Science},
	volume = {314},
	number = {5807},
	year = {2006},
	pages = {1920{\textendash}1922},
	keywords = {HOV Alvin (Human Occupied Vehicle)},
	issn = {0036-8075},
	doi = {10.1126/science.1133950},
	url = {http://dx.doi.org/10.1126/science.1133950},
	author = {Tolstoy, M and Cowen, J P and Baker, E T and Fornari, D J and Rubin, K H and Shank, T M and Waldhauser, F and Bohnenstiehl, D R and Forsyth, D W and Holmes, R C and Love, B and Perfit, M R and Weekly, R T and Soule, S A and Glazer, B}
}
