Index Catalog // ScholarsArchive@OSU

Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf

Creator:: Williams, Mark Charles
Abstract:: Since 2003, 39 small earthquakes have been detected offshore central Oregon in the nominally locked part of the Cascadia subduction zone, where very little seis- mic activity has been recorded in spite of a paleo-seismic record of great subduction events. Although the regional earthquake bulletin reports depths of 29 and...
Resource Type:: Masters Thesis
Full Text:: Plate Boundary Beneath the Oregon Continental Shelf Abstract approved: Anne M. Tréhu Since 2003, 39

A 3-D Tomographic Model of the P-wave Velocity Structure of the Central Cascadia Forearc

Creator:: Kenyon, Christopher Bradford
Abstract:: Signals from the R/V Langseth’s tuned airgun array were recorded on an array of 33 EarthScope FlexArray seismometers deployed in the Oregon Coast Range from 43.5° to 45°N as part of the 2012 Ridge2Trench experiment to image the structure of the Juan de Fuca plate. This segment of the Juan...
Resource Type:: Masters Thesis
Full Text:: Anne M. Tréhu Signals from the R/V Langseth’s tuned airgun array were recorded on an array

Structure of the crust beneath Lake Superior from forward modeling of large aperture seismic data

Creator:: Shay, John T.
Abstract:: Both travel times and amplitudes of large offset refracted and reflected arrivals observed during GLIMPCE (Great Lakes International Multidisciplinary Program on Crustal Evolution) along line A in Lake Superior have been modeled using two-dimensional ray tracing techniques. Forward modeling was used to iteratively refine an initial velocity model that was...
Resource Type:: Masters Thesis
Full Text:: my sincere appreciation to the members of my committee, Drs. Anne Trehu, Robert Lillie, John Di lles

Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Creator:: Lendl, Christof
Abstract:: This thesis presents elastic finite difference simulations of two dimensional wavefield propagation for line-9, recorded during the 1993 part of the multi-institutional, multi-year Mendocino Triple Junction (MTJ) Seismic Experiment. Line-9 is a high-resolution, large-aperture seismic profile oriented in north-south direction, extending from the subduction regime north of the MTJ to...
Resource Type:: Masters Thesis
Full Text:: approved Anne Tréhu This thesis presents elastic finite difference simulations of two dimensional

Bulldozer blades and colliding submarine mountain chains : constraints on central Oregon convergent margin tectonics from magnetics and gravity

Creator:: Fleming, Sean W.
Abstract:: Magnetic and gravity modelling was completed along two E-W transects offshore central Oregon. These models indicate that the backstop-forming western edge of the Siletz terrane has a seaward dip of approximately 40° to 49° at 44°48'N, shallowing to ~28° at 44°1 1 'N. This is a well-determined result, given available...
Resource Type:: Masters Thesis
Full Text:: Gravity. Abstract Approved: Anne M. Trehu Magnetic and gravity modelling was completed along two E-W

Seismic sequence stratigraphy and tectonic evolution of southern hydrate ridge

Creator:: Chevallier, Johanna
Abstract:: A 3D seismic volume was acquired summer 2000 over the southern end of Hydrate Ridge (FIR), an anomalously shallow ridge 100 km offshore Newport, Oregon. The survey followed a succession of scientific expeditions aimed at studying the gas hydrates present in the shallow subsurface that gave the name to the...
Resource Type:: Masters Thesis
Full Text:: thankful to my advisor, Anne Tréhu, for taking me as her student and for making the writing of this thesis

Local Seismicity Recorded by ChilePEPPER : Implications for Dynamic Accretionary Prism Response and Long-term Prism Evolution

Creator:: de Moor, Alexander
Abstract:: To investigate the dynamic response of the outer accretionary wedge updip from the patch of greatest slip during the Mw8.8 2010 Maule earthquake, 10 Ocean Bottom Seismometers (OBS) were deployed from May 2012 to March 2013 in a small array with an inter-instrument spacing of ~10 km. Nine instruments were...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Anne M. Tréhu To investigate the dynamic response of the outer accretionary wedge updip from

The Gorda Escarpment's rise and fall : synthesis of exploration seismology, sampling efforts, micropaleontology, and radiometric dating

Creator:: Potter, Susan M.
Abstract:: The Gorda Escarpment (40.4° N and from 126° W to 124.7° W) is a topographic high which is the eastern portion of the Mendocino Transform Fault. The Vizcaino Block is the anomalously shallow portion of the Pacific plate immediately south of the Gorda Escarpment. Sediments of the Vizcaino Block record...
Resource Type:: Masters Thesis
Full Text:: extremely thankful to my advisor, Anne Tréhu, for taking me on as a student. Her inspiration and support

P and S velocity structure beneath the Gulf of Maine

Creator:: Sattel, Daniel
Abstract:: Seismic refraction data collected in 1985 by the USGS were used in this study to derive the P and S velocity structure of the crust beneath the Gulf of Maine. The data quality differs among instruments and is affected by surficial lateral heterogeneities, a ringy source signature and reverberations. Velocity...
Resource Type:: Masters Thesis
Full Text:: acquisition for this experiment has been described by Tréhu (1987), and is summarized here. Data collection

Crustal structure of the Queen Charlotte Transform Fault Zone from multichannel seismic reflection and gravity data

Creator:: Scheidhauer, Maren
Abstract:: The Queen Charlotte Fault system is a segment of the North America - Pacific plate boundary. From 45 Ma - 5 Ma, plate motion has been primarily translational. Since 5 Ma, transpression has been the dominant mode of interaction. The plate boundary west of the Queen Charlotte Islands is characterized...
Resource Type:: Masters Thesis
Full Text:: . Redacted for Privacy Abstract approved: Anne M. Trehu The Queen Charlotte Fault system is a segment of

ScholarsArchive@OSU

Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf

A 3-D Tomographic Model of the P-wave Velocity Structure of the Central Cascadia Forearc

Structure of the crust beneath Lake Superior from forward modeling of large aperture seismic data

Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Bulldozer blades and colliding submarine mountain chains : constraints on central Oregon convergent margin tectonics from magnetics and gravity

Seismic sequence stratigraphy and tectonic evolution of southern hydrate ridge

Local Seismicity Recorded by ChilePEPPER : Implications for Dynamic Accretionary Prism Response and Long-term Prism Evolution

The Gorda Escarpment's rise and fall : synthesis of exploration seismology, sampling efforts, micropaleontology, and radiometric dating

P and S velocity structure beneath the Gulf of Maine

Crustal structure of the Queen Charlotte Transform Fault Zone from multichannel seismic reflection and gravity data

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