A 2-dimensional P-wave velocity model (MATLAB 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 MATLAB binary files - see the associated data set for the ASCII version of this model. The file contents is a Matlab structure (L3) with the following fields. Velocity model (L3.v) in km/s for all 107 depth intervals and 1705 x nodes. L3.v_masked is the same data masked to only contain velocity values in regions of good ray coverage. Depth to reflectors (L3.bat, 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 L3.lon are provided for 1705 x nodes in decimal degrees. L3.lat0 and L3.lon0 provide 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.