tt.s, tt.p {Rvelslant} | R Documentation |
Dataframe of travel-time measurements for P- and S-waves.
data(tt.p) data(tt.s)
tt.p
is a dataframe containing 5151 rows and tt.s
is a dataframe containing 5364 rows. Each dataframe has the folowing
columns:
[,1] | hole.code | An integer identifier for the site. |
[,2] | hoffset | Horizontal offset of the seismic source from borehole in meters. |
[,3] | z | Depth of each measurement in meters. |
[,4] | tt.slant | Travel-time of each measurement in seconds. |
[,5] | sig | Estimates of the standard deviation of each pick relative to the best pick. |
See reference for more information including descriptions and details of each hole code.
Eric M. Thompson <eric.thompson@tufts.edu>
http://quake.wr.usgs.gov/~boore/data_online.htm
Boore, D. M. (2003) A compendium of p- and s-wave velocities from surface-to-borehole logging: Summary and reanalysis of previously published data and analysis of unpublished data U.S. Geological Survey Open-File Report 03-191.
data(tt.p) data(tt.s) dim(tt.p) # [1] 5151 5 names(tt.p) # [1] "hole.code" "hoffset" "z" "tt.slant" "sig" dim(tt.s) # [1] 5364 5 names(tt.s) # [1] "hole.code" "hoffset" "z" "tt.slant" "sig"