Publications
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New recording package for VACM provides sensor flexibility New recording package for VACM provides sensor flexibility
For the past three decades, the VACM has been a standard for ocean current measurements. A VACM is a true vector-averaging instrument that computes north and east current vectors and averages temperature continuously over a specified interval. It keeps a running total of rotor counts, and records one-shot samples of compass, vane position and time. Adding peripheral sensors to the data...
Authors
William J. Strahle, S. E. Worrilow, S. E. Fucile, Marinna A. Martini
Antifouling leaching technique for optical lenses Antifouling leaching technique for optical lenses
The effectiveness of optical lenses deployed in water less than 100 m deep is significantly reduced by biofouling caused by the settlement of macrofauna, such as barnacles, hydroids, and tunicates. However, machineable porous plastic rings can be used to dispense antifoulant into the water in front of the lens to retard macrofaunal growth without obstructing the light path. Unlike...
Authors
William J. Strahle, C. L. Perez, Marinna A. Martini
Landslides in colluvium Landslides in colluvium
No abstract available.
Authors
Robert W. Fleming, Arvid M. Johnson
Decade-scale trend in sea water salinity revealed through d18O analysis of Montastraea annularis annual growth bands Decade-scale trend in sea water salinity revealed through d18O analysis of Montastraea annularis annual growth bands
Stable oxygen isotope ratios (1)180) of coral skeletons are influenced by ambient water temperature and by the oxygen isotope ratio in the surrounding sea water, which, in turn, is linked to evaporation (salinity) and precipitation. To investigate this relationship more thoroughly, we collected hourly temperature data from the Hen and Chickens Reef in the Florida Keys between 1975 and...
Authors
Robert B. Halley, Peter K. Swart, Richard E. Dodge, J. Harold Hudson
Seismic structure of the uppermost mantle beneath the Kenya rift Seismic structure of the uppermost mantle beneath the Kenya rift
A major goal of the Kenya Rift International Seismic Project (KRISP) 1990 experiment was the determination of deep lithospheric structure. In the refraction/wide-angle reflection part of the KRISP effort, the experiment was designed to obtain arrivals to distances in excess of 400 km. Phases from interfaces within the mantle were recorded from many shotpoints, and by design, the best...
Authors
Gordon R. Keller, J. Mechie, L.W. Braile, Walter D. Mooney, C. Prodehl
Quaternary tectonics of Utah with emphasis on earthquake-hazard characterization Quaternary tectonics of Utah with emphasis on earthquake-hazard characterization
This report consolidates and synthesizes information on Quaternary faulting, folding, and volcanism in Utah and characterizes recent tectonic activity throughout the state. The primary purpose is to provide a comprehensive reference on faultspecific seismic sources and surface rupture to facilitate the evaluation of earthquake hazards in Utah. Two 1:500,000-scale maps show Quaternary...
Authors
Suzanne Hecker
Geology and human activity in the Florida Keys Geology and human activity in the Florida Keys
No abstract available.
Authors
Eugene A. Shinn
Proposal for worldwide landslide hazard maps Proposal for worldwide landslide hazard maps
No abstract available.
Authors
E. E. Brabb
Priorities for landslide mapping during the International Decade of Hazard Reduction Priorities for landslide mapping during the International Decade of Hazard Reduction
No abstract available.
Authors
E. E. Brabb
Investigating Climate Change of Western North America Investigating Climate Change of Western North America
No abstract available.
Authors
James V. Geological Survey Gardner
Lake Baikal - A touchstone for global change and rift studies Lake Baikal - A touchstone for global change and rift studies
No abstract available.
Authors
Deborah R. Hutchinson, Steve M. Colman
Seismic evidence for active magmatic underplating beneath the Basin and Range Province, western United States Seismic evidence for active magmatic underplating beneath the Basin and Range Province, western United States
Near-vertical and wide-angle seismic reflection data provide evidence for the presence of a magma body at the base of the crust beneath Buena Vista Valley in northwestern Nevada. The seismic response of this hypothesized magma body is characterized by high-amplitude, near-vertical P wave reflections and a comparably strong P-to-S converted phase. The magma body, referred to here as the...
Authors
Craig M. Jarchow, George A. Thompson, Rufus D. Catchings, Walter D. Mooney