@article {Embley2014,
	title = {{Eruptive modes and hiatus of volcanism at West Mata seamount, NE Lau basin: 1996{\textendash}2012}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {15},
	number = {10},
	year = {2014},
	pages = {4093{\textendash}4115},
	abstract = {We present multiple lines of evidence for years to decade-long changes in the location and character of volcanic activity at West Mata seamount in the NE Lau basin over a 16 year period, and a hiatus in summit eruptions from early 2011 to at least September 2012. Boninite lava and pyroclasts were observed erupting from its summit in 2009, and hydroacoustic data from a succession of hydrophones moored nearby show near-continuous eruptive activity from January 2009 to early 2011. Successive differencing of seven multibeam bathymetric surveys of the volcano made in the 1996{\textendash}2012 period reveals a pattern of extended constructional volcanism on the summit and northwest flank punctuated by eruptions along the volcano{\textquoteright}s WSW rift zone (WSWRZ). Away from the summit, the volumetrically largest eruption during the observational period occurred between May 2010 and November 2011 at \~{}2920 m depth near the base of the WSWRZ. The (nearly) equally long ENE rift zone did not experience any volcanic activity during the 1996{\textendash}2012 period. The cessation of summit volcanism recorded on the moored hydrophone was accompanied or followed by the formation of a small summit crater and a landslide on the eastern flank. Water column sensors, analysis of gas samples in the overlying hydrothermal plume and dives with a remotely operated vehicle in September 2012 confirmed that the summit eruption had ceased. Based on the historical eruption rates calculated using the bathymetric differencing technique, the volcano could be as young as several thousand years.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	doi = {10.1002/2014GC005387},
	author = {Embley, R W and Merle, S G and Baker, E T and Rubin, K H and Lupton, J E and Resing, J A and Dziak, R P and Lilley, M D and Chadwick, W W and Shank, T M and Greene, R and Walker, S L and Haxel, J H and Olson, E J and Baumberger, T}
}
@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 {Chadwick2012a,
	title = {{Submarine landslide triggered by volcanic eruption recorded by in situ hydrophone}},
	journal = {Geology},
	volume = {40},
	number = {1},
	year = {2012},
	month = {jan},
	pages = {51{\textendash}54},
	publisher = {GEOLOGICAL SOC AMER, INC},
	address = {BOULDER; PO BOX 9140, BOULDER, CO 80301-9140 USA},
	abstract = {NW Rota-1 is a submarine volcano in the Mariana volcanic arc that is notable as the site where underwater explosive eruptions were first witnessed in A.D. 2004. After years of continuous low-level eruptive activity, a major landslide occurred at NW Rota-1 in August 2009, triggered by an unusually large eruption that produced 10 times the acoustic energy of the background level of activity. An anomalous earthquake swarm preceded the eruption, suggesting that the sequence started with a magmatic intrusion and associated faulting beneath the volcano. We quantify the size and extent of the landslide using bathymetric resurveys and interpret the timing of events using data from an in situ hydrophone. This is the first instrumental documentation of an earthquake-eruption-landslide sequence at a submarine volcano, and illustrates the close interaction between magmatic activity and mass wasting events in the growth of undersea arc volcanoes.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {0091-7613},
	doi = {10.1130/G32495.1},
	author = {Chadwick, W W and Dziak, R P and Haxel, J H and Embley, R W and Matsumoto, H}
}
