The data set accompanies the following publication: 
Schopper, F., Doetsch, J., Villiger, L., Krietsch, H., Gischig, V. S., Jalali, M., Amann, F., Dutler, N., 
Maurer, H. (in prep.). On the Variability in Pressure Propagation during Hydraulic Stimulation based on 
Seismic Velocity Observations.


For each of the 11 hydraulic stimulation experiments a MATLAB file is given containing the following data 
structure:

e.g.

HS2                         # The main structure contains data for the hammer sources, piezo sources as well 
                            # as the inversion.
_________________
HS2.hammer                  # Data relevant for hammer sources.
HS2.piezo_1                 # Data relevant to piezo source 1.
HS2.piezo_2                 # Data relevant to piezo source 2.
HS.inversion                # Data relevant for the inversion
_________________
HS2.hammer.time             # Contains a string vector with the times in UTC+1 of the source signals (n x 1)
HS2.hammer.hammer_index     # Contains a vector specifying the hammer source number. Generally, the hammer 
                            # sources are triggered sequentially in the correct order. (n x 1)
HS2.hammer.trigger          # Contains the trigger signal for each of the sources. (n x 1 x samples)
HS2.hammer.channel          # Contains the recorded waveforms for each of the sources and channels.
                            # (n x channels x samples)
HS2.hammer.sampling_rate    # Contains the sampling rate of the recorded waveforms [Hz]
_________________
.                           # The structure for piezo sources 1 and 2 follows the identical scheme
.
.
_________________
HS2.inversion.GJ            # Sensitivity matrix GJ containing the ray path lengths in each voxel[m]
HS2.inversion.GC            # Geostatistical regularisation matrix GC
HS2.inversion.mref          # Contains the baseline velocity model as a vector for the inversion [s/m]
HS2.inversion.mref_reshape  # Contains the reshaped baseline velocity model
HS2.inversion.dref          # Contains the reference traveltimes for each source-receiver combinations, in the
                            # following order: hammer source 1: channels 1-26, hammer source 2: channels 1-26, ...
                            # piezo source 1: channels 1-26, piezo source 2: channels 1-26,
HS2.inversion.x             # x-Coordinates
HS2.inversion.y             # y-Coordinates
HS2.inversion.z             # z-Coordinates


The coordinates of the seismic sources and receivers in Swiss Grid 1903 coordinates are
given in seismic_sources.csv and seismic_receivers.csv as comma separated ASCII files.
For the Figures in the publication, the following coordinate values have been subtracted:

xshift = 667400;
yshift = 158800;
zshift = 1700;