Results 121 to 130 of about 311 (158)

Porosity of the upper edifice of Axial Seamount

Geology, 2007
Seamounts are not solid basalt structures, but have relatively high porosities in their upper crustal sections. At Axial Seamount, off the coast of Oregon, United States, we used on-bottom gravity measurements with a Bell gravity meter within deep-sea submersible Alvin to determine a porosity of 31% for the uppermost ∼100 m of the edifice.
Lisa A. Gilbert, Russell E. McDuff, H. Paul Johnson   +2 more
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Circulation near Axial Seamount

Journal of Geophysical Research: Solid Earth, 1990
Year‐long moored current measurements from 1987 to 1988 on the saddle (1860 m) between Axial Volcano and Brown Bear Seamount show an oscillating flow with a broadband frequency centered at about 4 days and a long‐term average flow of about 4 cm/s southward.
G. A. Cannon, D. J. Pashinski
openaire   +1 more source

Combined acoustical and seismic studies of Axial Seamount

The Journal of the Acoustical Society of America, 2021
The NSF Ocean Observatories Initiatives Regional Cabled Array at Axial Seamount provides a remarkable facility for sustained studies of an active submarine volcano. A local seismic network supports a real-time earthquake catalog and hydrophones monitor sounds in the water column.
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Probing earthquake triggering by static and dynamic stresses at Axial Seamount

2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Tan, Y., Barkat, A., Xu, G., Waldhauser, F., Tolstoy, M., Wilcock, W., Scholz, C.   +6 more
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Observing and interpreting seafloor tilt at Axial Seamount

2020
Measurements of ground tilt are a critical geodetic tool for monitoring active volcanoes because they provide multidimensional data that can resolve complex deformation signals. We are developing a Self-Calibrating Tilt Accelerometer (SCTA) for use in the marine environment and present results from two deployments: on land at the Scripps Institution of
Erik Fredrickson, William Wilcock, Christian Baillard, Michael Harrington, Geoff Cram, James Tilley, William Chadwick, Scott Nooner   +7 more
openaire   +1 more source

Inflation-predictable behavior and co-eruption deformation at Axial Seamount

Science, 2016
Volcano monitoring goes into the deep Axial Seamount is a large and active submarine volcano along the Juan de Fuca midocean ridge off the coast of the western United States. Eruptions in 1998 and 2011 were followed by periods of magma recharge, making it an ideal location to include in the Ocean Observatories Initiative Cabled ...
Scott L, Nooner, William W, Chadwick
openaire   +2 more sources

Axial Seamount: A Wired Submarine Volcano Observatory in the NE Pacific

2021
<p>Axial Seamount is the most active submarine volcano in the NE Pacific Ocean, and is monitored by instruments connected to a cabled observatory (the US Ocean Observatories Initiative Cabled Array), supplemented by autonomous battery-powered instruments on the seafloor at ~1500 m depth.  Axial Seamount is a basaltic hot spot
William W. Chadwick, Scott L. Nooner, William S. D. Wilcock, Maya Tolstoy, Felix Waldhauser, Deborah S. Kelley, Adrien F. Arnulf, Suzanne M. Carbotte, Jeff W. Beeson   +8 more
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Seismic constraints on caldera dynamics from the 2015 Axial Seamount eruption

Science, 2016
Volcano monitoring goes into the deep Axial Seamount is a large and active submarine volcano along the Juan de Fuca midocean ridge off the coast of the western United States. Eruptions in 1998 and 2011 were followed by periods of magma recharge, making it an ideal location to include in the Ocean Observatories Initiative Cabled ...
William S D, Wilcock, Maya, Tolstoy, Felix, Waldhauser, Charles, Garcia, Yen Joe, Tan, DelWayne R, Bohnenstiehl, Jacqueline, Caplan-Auerbach, Robert P, Dziak, Adrien F, Arnulf, M Everett, Mann   +9 more
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A microseismicity survey of Axial Seamount, Juan de Fuca Ridge

Bulletin of the Seismological Society of America, 1987
Abstract An array of ocean bottom seismometers and hydrophones were deployed within the caldera of Axial Seamount, located at the intersection of the Cobb-Eickelberg Seamount Chain and the Juan de Fuca Ridge. Recent manned submersible dives have discovered the presence of two distinct hydrothermal vent fields.
R. S. Jacobson, L. D. Bibee, R. W. Embley, S. R. Hammond   +3 more
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Compartmentalization of Axial Seamount's magma reservoir inferred by analytical and numerical deformation modeling with realistic geometry

Journal of Geophysical Research: Solid Earth, 2023
Axial Seamount is a submarine volcano on the Juan de Fuca Ridge with enhanced magma supply from the Cobb Hotspot. Here we compare several deformation model configurations to explore how the spatial component of Axial’s deformation time series relates to magma reservoir geometry imaged by multi-channel seismic (MCS) surveys.
S. R. Slead, M. Wei, S. L. Nooner, W. W. Chadwick, D. W. Caress, J. Beeson   +5 more
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