@article {RN87,
	title = {Passive acoustic records of seafloor methane bubble streams on the Oregon continental margin},
	journal = {Deep Sea Research Part II: Topical Studies in Oceanography},
	volume = {150},
	year = {2018},
	pages = {210-217},
	type = {Journal Article},
	abstract = {We present acoustic records of methane bubble streams recorded ~10 km southwest of Heceta Bank on the Oregon continental margin using an autonomous hydrophone. The hydrophone was deployed at 1228 m water depth via a Remotely Operated Vehicle (ROV) during the E/V Nautilus expedition (NA072) in June 2016. Bubble sound is produced by detachment of the gas bubble from the end of a tube or conduit which causes the bubble to oscillate, producing a sound signal. Despite persistent ship propeller and ROV noise, the acoustic signature of the overall bubble seep site can be seen in the hydrophone record as a broadband (1.0 {\textendash} 45 kHz) series of short duration (~10{\textendash}20 ms) oscillatory signals that occur in clusters lasting 2{\textendash}3 s. The frequency of an individual bubble{\textquoteright}s oscillation is proportional to the bubble{\textquoteright}s radius; estimates here of bubble radii are consistent with bubble sizes observed in ROV still images. Acoustic signal loss models imply bubble sounds might be recorded over an area of seafloor from ~300 {\textendash} 3.2 {\texttimes} 104 m2. This study represents a first-step in attempting to identify and quantify deep-ocean bubble stream sounds using passive acoustic techniques.},
	keywords = {Bubble streams, E/V Nautilus Cruise ID NA072, Gas flux, Methane seep, Passive acoustics},
	issn = {0967-0645},
	doi = {10.1016/j.dsr2.2018.04.001},
	url = {http://www.sciencedirect.com/science/article/pii/S096706451730084X},
	author = {Dziak, R. P. and Matsumoto, H. and Embley, R. W. and Merle, S. G. and Lau, T. K. and Baumberger, T. and Hammond, S. R. and Raineault, N.}
}
@article {RN2,
	title = {THE RECENT VOLCANIC HISTORY OF AXIAL SEAMOUNT Geophysical Insights into Past Eruption Dynamics with an Eye Toward Enhanced Observations of Future Eruptions},
	journal = {Oceanography},
	volume = {31},
	number = {1},
	year = {2018},
	pages = {114-123},
	type = {Journal Article},
	abstract = {To understand the processes that form oceanic crust as well as the role of submarine volcanoes in exchanging heat and chemicals with the ocean and in supporting chemosynthetic biological communities, it is essential to study underwater eruptions. The world{\textquoteright}s most advanced underwater volcano observatory{\textemdash}the Ocean Observatories Initiative Cabled Array at Axial Seamount{\textemdash}builds upon ~30 years of sustained geophysical monitoring at this site with autonomous and remote systems. In April 2015, only months after the Cabled Array{\textquoteright}s installation, it recorded an eruption at Axial Seamount, adding to the records of two prior eruptions in 1998 and 2011. Between eruptions, magma recharge is focused beneath the southeast part of the summit caldera, leading to steady inflation and increasing rates of seismicity. During each eruption, the volcano deflates over days to weeks, coincident with high levels of seismicity as a dike is emplaced along one of the volcano{\textquoteright}s rifts and lava erupts on the seafloor. Cabled Array seismic data show that motions on an outward-dipping ring fault beneath the caldera accommodate the inflation and deflation. Eruptions appear to occur at a predictable level of inflation; hence, it should be possible to time deployments of additional cabled and autonomous instrumentation to further enhance observations of the next eruption.},
	issn = {1042-8275},
	doi = {10.5670/oceanog.2018.117},
	url = {<Go to ISI>://WOS:000427367300017},
	author = {Wilcock, W. S. D. and Dziak, R. P. and Tolstoy, M. and Chadwick, W. W. and Nooner, S. L. and Bohnenstiehl, D. R. and Caplan-Auerbach, J. and Waldhauser, F. and Arnulf, A. F. and Baillard, C. and Lau, T. K. and Haxel, J. H. and Tan, Y. J. and Garcia, C. and Levy, S. and Mann, M. E.}
}
@article {RN5,
	title = {Explosive processes during the 2015 eruption of Axial Seamount, as recorded by seafloor hydrophones},
	journal = {Geochemistry Geophysics Geosystems},
	volume = {18},
	number = {4},
	year = {2017},
	pages = {1761-1774},
	type = {Journal Article},
	abstract = {Following the installation of the Ocean Observatories Initiative cabled array, the 2015 eruption of Axial Seamount, Juan de Fuca ridge, became the first submarine eruption to be captured in real time by seafloor seismic and acoustic instruments. This eruption also marked the first instance where the entire eruption cycle of a submarine volcano, from the previous eruption in 2011 to the end of the month-long 2015 event, was monitored continuously using autonomous ocean bottom hydrophones. Impulsive sounds associated with explosive lava-water interactions are identified within hydrophone records during both eruptions. Explosions within the caldera are acoustically distinguishable from those occurring in association with north rift lava flows erupting in 2015. Acoustic data also record a series of broadband diffuse events, occurring in the waning phase of the eruption, and are interpreted as submarine Hawaiian explosions. This transition from gas-poor to gas-rich eruptive activity coincides with an increase in water temperature within the caldera and with a decrease in the rate of deflation. The last recorded diffuse events coincide with the end of the eruption, represented by the onset of inflation. All the observed explosion signals couple strongly into the water column, and only weakly into the solid Earth, demonstrating the importance of hydroacoustic observations as a complement to seismic and geodetic studies of submarine eruptions.},
	issn = {1525-2027},
	doi = {10.1002/2016gc006734},
	url = {<Go to ISI>://WOS:000403478500025},
	author = {Caplan-Auerbach, J. and Dziak, R. P. and Haxel, J. and Bohnenstiehl, D. R. and Garcia, C.}
}
@article {RN6,
	title = {Seismic constraints on caldera dynamics from the 2015 Axial Seamount eruption},
	journal = {Science},
	volume = {354},
	number = {6318},
	year = {2016},
	pages = {1395-1399},
	type = {Journal Article},
	abstract = {Seismic observations in volcanically active calderas are challenging. A new cabled observatory atop Axial Seamount on the Juan de Fuca ridge allows unprecedented real-time monitoring of a submarine caldera. Beginning on 24 April 2015, the seismic network captured an eruption that culminated in explosive acoustic signals where lava erupted on the seafloor. Extensive seismic activity preceding the eruption shows that inflation is accommodated by the reactivation of an outward-dipping caldera ring fault, with strong tidal triggering indicating a critically stressed system. The ring fault accommodated deflation during the eruption and provided a pathway for a dike that propagated south and north beneath the caldera{\textquoteright}s east wall. Once north of the caldera, the eruption stepped westward, and a dike propagated along the extensional north rift.},
	issn = {1095-9203 (Electronic) 0036-8075 (Linking)},
	doi = {10.1126/science.aah5563},
	url = {https://www.ncbi.nlm.nih.gov/pubmed/27980204},
	author = {Wilcock, W. S. and Tolstoy, M. and Waldhauser, F. and Garcia, C. and Tan, Y. J. and Bohnenstiehl, D. R. and Caplan-Auerbach, J. and Dziak, R. P. and Arnulf, A. F. and Mann, M. E.}
}
@article {RN231,
	title = {THE CASCADIA INITIATIVE A Sea Change In Seismological Studies of Subduction Zones},
	journal = {Oceanography},
	volume = {27},
	number = {2},
	year = {2014},
	pages = {138-150},
	type = {Journal Article},
	abstract = {Increasing public awareness that the Cascadia subduction zone in the Pacific Northwest is capable of great earthquakes (magnitude 9 and greater) motivates the Cascadia Initiative, an ambitious onshore/offshore seismic and geodetic experiment that takes advantage of an amphibious array to study questions ranging from megathrust earthquakes, to volcanic arc structure, to the formation, deformation and hydration of the Juan De Fuca and Gorda Plates. Here, we provide an overview of the Cascadia Initiative, including its primary science objectives, its experimental design and implementation, and a preview of how the resulting data are being used by a diverse and growing scientific community. The Cascadia Initiative also exemplifies how new technology and community-based experiments are opening up frontiers for marine science. The new technology{\textemdash}shielded ocean bottom seismometers{\textemdash}is allowing more routine investigation of the source zone of megathrust earthquakes, which almost exclusively lies offshore and in shallow water. The Cascadia Initiative offers opportunities and accompanying challenges to a rapidly expanding community of those who use ocean bottom seismic data.},
	issn = {1042-8275},
	doi = {10.5670/oceanog.2014.49},
	author = {Toomey, D. R. and Allen, R. M. and Barclay, A. H. and Bell, S. W. and Bromirski, P. D. and Carlson, R. L. and Chen, X. W. and Collins, J. A. and Dziak, R. P. and Evers, B. and Forsyth, D. W. and Gerstoft, P. and Hooft, E. E. E. and Livelybrooks, D. and Lodewyk, J. A. and Luther, D. S. and McGuire, J. J. and Schwartz, S. Y. and Tolstoy, M. and Trehu, A. M. and Weirathmueller, M. and Wilcock, W. S. D.}
}
