@article {Baumberger2014,
	title = {{Understanding a submarine eruption through time series hydrothermal plume sampling of dissolved and particulate constituents: West Mata, 2008-2012}},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {15},
	number = {12},
	year = {2014},
	pages = {4631{\textendash}4650},
	abstract = {Four cruises between 2008 and 2012 monitored the continuing eruption of West Mata volcano in the NE Lau Basin as it produced plumes of chemically altered water above its summit. Although large enrichments in He-3, CO2, Fe, and Mn were observed in the plumes, the most notable enrichment was that of H-2, which reached concentrations as high as 14,843 nM. Strongly enriched H-2 concentrations in the water column result from reactions between seawater or magmatic water and extremely hot rocks. In 2008, the observation of elevated H-2 concentrations in the water column above West Mata pointed to vigorous ongoing eruptions at the volcano{\textquoteright}s summit. The eruption was confirmed by visual observations made by the ROV Jason 2 in 2009 and demonstrated that H-2 measurements are a vital instrument to detect ongoing volcanic eruptions at the seafloor. Elevated H-2 in 2010 showed that the eruption was ongoing, although at a reduced level given a maximum H-2 concentration of 4410 nM. In 2012, H-2 levels in the water column declined significantly, to a maximum of only 7 nM, consistent with visual observations from the Quest-4000 ROV that found no evidence of an ongoing volcanic eruption. Methane behaved independently of other measured gases and its concentrations in the hydrothermal plume were very low. We attribute its minimal enrichments to a mixture of mantle carbon reduced to CH4 and biological CH4 from diffuse flow sites. This study demonstrates that ongoing submarine volcanic eruptions are characterized by high dissolved H-2 concentrations present in the overlying water column.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	doi = {10.1002/2014GC005460},
	author = {Baumberger, T and Lilley, M D and Resing, J A and Lupton, J E and Baker, E T and Butterfield, D A and Olson, E J and Fruh-Green, G L}
}
@article {Chadwick2012,
	title = {{Seafloor deformation and forecasts of the April 2011 eruption at Axial Seamount}},
	journal = {Nature Geoscience},
	volume = {5},
	number = {7},
	year = {2012},
	month = {jul},
	pages = {474{\textendash}477},
	publisher = {NATURE PUBLISHING GROUP},
	address = {NEW YORK; 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA},
	abstract = {Axial Seamount is an active submarine volcano located at the intersection between the Cobb hotspot and the Juan de Fuca spreading centre in the northeast Pacific Ocean1, 2. The volcano has been closely monitored since it erupted in 1998 (refs~3, 4). Since then, Axial Seamount seemed to exhibit a similar inflation{\textendash}deflation cycle to basaltic volcanoes on land and, on that basis, was expected to erupt again sometime before 2014 or 2020 (refs~5, 6). In April 2011 Axial Seamount erupted. Here we report continuous measurements of ocean bottom pressure that document the deflation{\textendash}inflation cycle of Axial Seamount between 1998 and 2011. We find that the volcano inflation rate, caused by the intrusion of magma, gradually increased in the months leading up to the 2011 eruption. Sudden uplift occurred 40{\textendash}55 min before the eruption onset, which we interpret as a precursor event. Based on our measurements of ground deformation through the entire eruption cycle at Axial Seamount, we suggest that another eruption could occur as early as 2018. We propose that the long-term eruptive cycle of Axial Seamount could be more predictable compared with its subaerial counterparts because the volcano receives a relatively steady supply of magma through the Cobb hotspot and because it is located on thin oceanic crust at a spreading plate boundary.},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {1752-0894},
	doi = {10.1038/ngeo1464},
	author = {Chadwick, W W and Nooner, S L and Butterfield, D A and Lilley, M D}
}
@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 {Tunnicliffe2009,
	title = {{Survival of mussels in extremely acidic waters on a submarine volcano}},
	journal = {Nature Geoscience},
	volume = {2},
	number = {5},
	year = {2009},
	month = {may},
	pages = {344{\textendash}348},
	publisher = {NATURE PUBLISHING GROUP},
	address = {NEW YORK; 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {1752-0894},
	doi = {10.1038/NGEO500},
	author = {Tunnicliffe, V and Davies, K T A and Butterfield, D A and Embley, R W and Rose, J M and Chadwick, W W}
}
@article {Embley2007,
	title = {{Exploring the submarine ring of fire: Mariana Arc-Western Pacific}},
	journal = {Oceanography},
	volume = {20},
	number = {4},
	year = {2007},
	pages = {69{\textendash}80},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {1042-8275},
	doi = {10.5670/oceanog.2007.07},
	author = {Embley, R W and Baker, E T and Butterfield, D A and Chadwick, W W and Lupton, J E and Resing, J A and de Ronde, C E J and Nakamura, K I and Tunnicliffe, V and Dower, J F and Merle, S G}
}
@article {Sharma2007,
	title = {{Search for the proverbial mantle osmium sources to the oceans: Hydrothermal alteration of mid-ocean ridge basalt}},
	journal = {Geochimica et Cosmochimica Acta},
	volume = {71},
	number = {19},
	year = {2007},
	pages = {4655{\textendash}4667},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {0016-7037},
	doi = {10.1016/j.gca.2007.06.062},
	url = {http://dx.doi.org/10.1016/j.gca.2007.06.062},
	author = {Sharma, M and Rosenberg, E J and Butterfield, D A}
}
@article {Lang2006,
	title = {{Dissolved organic carbon in ridge-axis and ridge-flank hydrothermal systems}},
	journal = {Geochimica et Cosmochimica Acta},
	volume = {70},
	number = {15},
	year = {2006},
	pages = {3830{\textendash}3842},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {0016-7037},
	doi = {10.1016/j.gca.2006.04.031},
	url = {http://dx.doi.org/10.1016/j.gca.2006.04.031},
	author = {Lang, S Q and Butterfield, D A and Lilley, M D and Johnson, H P and Hedges, J I}
}
@article {Huber2006,
	title = {{Microbial life in ridge flank crustal fluids}},
	journal = {Environmental Microbiology},
	volume = {8},
	number = {1},
	year = {2006},
	pages = {88{\textendash}99},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {1462-2912},
	doi = {10.1111/j.1462-2920.2005.00872.x},
	url = {http://dx.doi.org/10.1111/j.1462-2920.2005.00872.x},
	author = {Huber, J A and Johnson, H P and Butterfield, D A and Baross, J A}
}
@article {Lilley2003,
	title = {{Magmatic events can produce rapid changes in hydrothermal vent chemistry}},
	journal = {Nature},
	volume = {422},
	number = {6934},
	year = {2003},
	pages = {878{\textendash}881},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {0028-0836},
	doi = {10.1038/nature01569},
	url = {http://dx.doi.org/10.1038/nature01569},
	author = {Lilley, M D and Butterfield, D A and Lupton, J E and Olson, E J}
}
@article {Butterfield2001,
	title = {{Evidence for basaltic Sr in midocean ridge-flank hydrothermal systems and implications for the global oceanic Sr isotope balance}},
	journal = {Geochimica et Cosmochimica Acta},
	volume = {65},
	number = {22},
	year = {2001},
	pages = {4141{\textendash}4153},
	keywords = {HOV Alvin (Human Occupied Vehicle), ROV Jason (Remotely Operated Vehicle)},
	issn = {0016-7037},
	doi = {10.1016/S0016-7037(01)00712-8},
	url = {http://dx.doi.org/10.1016/S0016-7037(01)00712-8},
	author = {Butterfield, D A and Nelson, B K and Wheat, C G and Mottl, M J and Roe, K K}
}
