Marine Geoscience Data System
CascadiaRidge2Trench Seismic:Velocity:Model
A 2-dimensional P-wave velocity model (ASCII format) along the MARGIN Transect (Line 3) of the Juan de Fuca Ridge-to-Trench study
This data set consists of a 2-dimensional P-wave velocity model and depth-to-reflectors from first-arrival travel-time tomography of OBS wide-angle refraction and reflection data acquired along the MARGIN Transect (Line 3) of the Juan de Fuca Ridge-to-Trench study. The model is provided in both MATLAB and ASCII format with columns as defined below and within files. Here we present the ASCII files - see the associated data set for the MATLAB version of this model. The ASCII file contents are as follows. Velocity model (L3_v) in km/s for all 107 depth intervals and 1705 x nodes. L3_vmask is the same data masked to only contain velocity values in regions of good ray coverage. Depth to reflectors (L3_bathymetry, L3_basement, L3_moho) for 1705 x nodes in km below sea level. L3_z provides depths for 107 z nodes in km below seafloor. L3_x provides distance in km along the transect from the Oregon Transect (L1), with negative values indicating distances south of L1. L3 lat and lon are provided for 1705 x nodes in decimal degrees. L3_zero provides the lat lon coordinates in decimal degrees of the intersections of L1 and L3. The seismic velocity model is referenced in Horning et al., 2016 and in Canales et al., 2017 and details on acquisition and processing maybe found in those papers. The data set was generated as part of the project called Evolution and Hydration of the Juan de Fuca Crust and Uppermost Mantle: A Plate-Scale Seismic Investigation from Ridge to Trench. Funding was provided through NSF awards OCE10-29305,OCE10-29411.
Device Info
The data have been processed/modified to a level beyond that of basic quality control (e.g. final processed sonar data, photo-mosaics).

Data Files


Acquisition Information

Data Citation Information

Related Data Sets

ISO/XML Metadata