Results 101 to 110 of about 6,578 (212)
Acoustic noise measurements on Axial Seamount, Juan De Fuca Ridge
Geophysical Research Letters, 1986 Anomalously high ambient acoustic noise was observed within the caldera of Axial Seamount, located on the Juan de Fuca Ridge at 46°N. Noise spectra from 2 to 30 Hz were calculated from hydrophone signals from four separate seismic recording systems. Noise levels varied up to 25 dB over 6 km.
L. D. Bibee, R. S. Jacobson
openaire +1 more source
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.Abstract We present SGLOBE‐Q2D, a global upper mantle model of frequency‐dependent Rayleigh wave attenuation with uncertainties. We use a data set of ∼ ${\sim} $10 million fundamental and higher mode (up to 4th overtone) Rayleigh wave amplitude measurements with wave periods T∼ ${\sim} $38–275 s.
William Sturgeon, Ana M. G. Ferreira
wiley +1 more source
High-resolution near-bottom vector magnetic anomalies over Raven Hydrothermal Field, Endeavour Segment, Juan de Fuca Ridge [PDF]
, 2014 Author Posting. © American Geophysical Union, 2014. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution.
Hutnak, Michael +3 more
core +1 more source
Carbon fixation by basalt-hosted microbial communities
Frontiers in Microbiology, 2015 Oceanic crust is a massive potential habitat for microbial life on Earth, yet our understanding of this ecosystem is limited due to difficulty in access. In particular, measurements of rates of microbial activity are sparse. We used stable carbon isotope
Beth N Orcutt +6 more
doaj +1 more source
Isotopic niche variability in macroconsumers of the East Scotia Ridge (Southern Ocean) hydrothermal vents: What more can we learn from an ellipse? [PDF]
, 2016 Aspects of between-individual trophic niche width can be explored through the isotopic niche concept. In many cases isotopic variability can be influenced by the scale of sampling and biological characteristics including body size or sex.
McGill, R.A.R. +4 more
core +2 more sources
Magnetic alteration of zero-age oceanic basalt [PDF]
, 1996 The youngest sampled submarine lava flow, which erupted June 1993 on the Juan de Fuca Ridge, provides the basis for a tight constraint on the initial or zero-age magnetization state of MORB.
Gee, Jeffrey S., Kent, Dennis V.
core +2 more sources
Seafloor Electromagnetic Measurements above Axial Seamount, Juan de Fuca Ridge
Journal of geomagnetism and geoelectricity, 1997 Magnetotelluric (MT) data were collected at three sites around the eastern rim of the caldera of Axial Seamount, on the Juan de Fuca Ridge. The seamount has been observed to be volcanically and hydrothermally active over the last ten years, and is therefore an excellent target for electromagnetic induction studies on the seafloor. This paper follows an
S. C. Constable +3 more
openaire +2 more sources
Low-Temperature Hydrothermal Plumes in the Near-Bottom Boundary Layer at Endeavour Segment, Juan de Fuca Ridge [PDF]
Oceanography, 2012 Low-temperature (typically 5–75°C) fluid, commonly referred to as "diffuse" hydrothermal flow, emanates from fractures over a significant portion of the Juan de Fuca Ridge seafloor in the Northeast Pacific Ocean (Kelley et al., 2012, in this issue ...
Susan Hautala +4 more
doaj
This activity was designed to help students develop a better understanding of the Earth's plates and their distribution. They will explore plate motions and the interactions of the plates along the plate boundaries by re-assembling a map of the earth ...
Larry Braile, Sheryl Braile
core +1 more source
Tectonic synthesis of the Olympic Mountains segment of the Cascadia wedge, using two-dimensional thermal and kinematic modeling of thermochronological ages [PDF]
, 2001 A fully coupled two-dimensional kinematic and thermal model of a steady state accretionary wedge, constrained by an extensive data set of fission track and (U-Th)/He ages for apatite and zircon, is here used to investigate the development of the Olympic ...
Batt, Geoffrey E. +3 more
core +2 more sources