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UBC Theses and Dissertations

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UBC Theses and Dissertations

Seismic velocity structure under Vancouver Island from travel time inversion : insight from Low Frequency… Savard, Geneviève 2018

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33426-ubc_2018_september_savard_genevieve_supp_readme.pdf [ 57.7kB ] [ 367.56kB ] [ 1.39MB ]
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List of Supplementary MaterialThis repository contains the 3D velocity models for Vp and Vs and the hypocenter relocations from the travel time tomography studies presented in this thesis.The folder “SVI” contains data for southern Vancouver Island and “NVI”, for northern Vancouver Island. Each folder contains 7 files:• tomoDDrelocations.csv: There are 12 columns: event ID, year, month, day, hour, minutes, seconds, latitude, longitude, depth (km), cluster (optional), type. The first column, “event ID” contains individual event identification numbers that we assigned to each event and can be ignored. “Type” is either “catalog” for events present in the GSC earthquake catalog (or, for some events for SVI, obtained from the previous study of Thomas Brocher), “lfe” for our LFE catalog and “detection” for events we detected with our modified cross-station method and used for tomography. For the SVI dataset, “cluster” is between 1 and 27 for the clusters identified through cross-correlation coefficients linkage (and hence concerns events between 2002 and 2006 for which we had waveform data available). The value is 0 otherwise. • grdinfo.dat: Information on the origin of the coordinate system (X-Y-Z) and inversion grid nodes in km from the origin.• Vp_model.dat: Vp value for each X-Y-Z point of the coordinate system in the following structure:Vp(1,1,1), Vp(2,1,1),... ..., Vp(nx,1,1)Vp(1,2,1), Vp(2,2,1),... ..., Vp(nx,2,1)... ...Vp(1,ny,1),Vp(2,ny,1),... ..., Vp(nx,ny,1)... ...Vp(1,ny,nz), Vp(2,ny,nz),... ..., Vp(nx,ny,nx)where nx, ny and nz are the number of grid nodes in the X, Y and Z direction respectively.• Vs_model.dat: same as Vp_model.dat but for S-waves.• inversion_grid.dat: corresponding latitude and longitude for each line of the velocity model file, separated by “>”.• P.dws: Derivative Weight Sum value for each data point of the Vp  model.• S.dws: same as P.dws but for S-waves.Additional data requests should be sent by email to Geneviève Savard at:


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