An airgun refraction line along the length of the caldera of Axial Seamount as
recorded by three Ocean Bottom Seismometers has been analyzed using the tau-zeta
inversion technique (Dorman and Jacobson, 1981). Five resulting velocity profiles
show that the seismic velocities of the upper 1.4 km of the crust are...
The continuation of conductive temperature fields is being
considered. The continuation of a field involves the extrapolation of a
field known over a limited domain to an adjacent domain in such a way
that it satisfies the heat conduction differential equation and other
imposed constraints. Continuations forward in time and...
Three seismic refraction profiles obtained between 42°N and
43°N along the median valley of the Gorda Ridge, an active spreading
center, allow the computation of the velocity structure underlying the
valley. Wide angle reflections which appear on the seismic records
suggest the existence of a velocity inversion underlying layer 3...
This review documents the advances in our knowledge of the oceanic internal wave field during the past quadrennium. Emphasis is placed on studies that deal most directly with the measurement and modeling of internal waves as they exist in the ocean. Progress has come by realizing that specific physical processes...
The purpose of this report is to review existing wildfire prevention activities and recommend strategies to reduce the number and severity of human-caused wildfires in Oregon.
Oregon’s forest protection system was created in 1911. At that time, timber harvesting, forest management, and other land-clearing activities were the predominant uses of...
About 6 million acres of Oregon wildlands have no organization responsible for suppressing wildfires. Most of these lands are in remote areas of the state with low population density and relatively low resource values. Some wildfires on these lands become large fires that damage adjacent landowner resources and property, threaten...