Shear-wave splitting measurements for western and central United States

Most of the measurements below (version 1308) are described in three publications:


1). Liu, K.H., A. Elsheikh, A. Lemnifi, U. Purevsuren, M. Ray, H. Refayee, B. Yang, Y. Yu, and S.S. Gao (2014), 
    A uniform database of teleseismic shear wave splitting measurements for the western and central United States, 
    Geochemistry Geophysics Geosystems , doi: 10.1002/2014GC005267

2). Liu, K.H. (2009), NA-SWS-1.1: A uniform database of teleseismic shear-wave splitting measurements for North America, 
    Geochemistry, Geophysics, Geosystems, 10, Q05011, doi:10.1029/2009GC002440

3). Refayee, H.A., B.B. Yang, K.H. Liu, and S.S. Gao (2013), Mantle flow and lithosphere-asthenosphere coupling beneath the 
    southwestern edge of the North American Craton: Constraints from shear-wave splitting measurements, Earth and Planetary 
    Science Letters , 10.1016/j.epsl.2013.01.031.

4). Yang, B.B., S.S. Gao, K.H. Liu, A.A. Elsheikh, A.A. Lemnifi, H.A. Refayee, and Y. Yu (2014), Seismic anisotropy and mantle 
    flow beneath the northern Great Plains of North America, Journal of Geophysical Research, , volume 119, doi: 10.1002/2013JB010561

In addition, the measurements were produced using the procedure 
described in the following paper:

5). Liu, K.H, and S.S. Gao (2013), Making reliable shear-wave splitting measurements, Bulletin of the Seismological Society of America, 
    Volume 103, No.5, 14 pages, doi: 10.1785/0120120355


Kelly H. Liu                       Stephen S. Gao
Professor of Geophysics            Professor of Geophysics
http://www.mst.edu/~liukh          http://www.mst.edu/~sgao
liukh@mst.edu                      sgao@mst.edu

Geology & Geophysics Program      
Missouri University of Science and Technology       
Rolla, MO 65409, USA       

------------------------------------------------------------------

For online access to this database visit IRIS DMC Data Products page for 
The Missouri S&T western and central United States shear-wave splitting database

http://ds.iris.edu/ds/products/sws-db-mst/

------------------------------------------------------------------
The columns are:

c1: Station_network name. The station name is padded with "x"s if it has less than 6 characters, and the network name is padded with a "y" 
    if it has only one character

c2: Phase name (SKS, PKS, SKK which is SKKS) 

c3: Event name (EQ + yr + ddd + hh + mm)

c4: Station latitude in deg.

c5: Station longitude in deg.

c6). Fast polarization direction in degree, measured clockwise from the North

c7). The standard deviation of the fast direction in degree

c8). Splitting time in second

c9). The standard deviation of the splitting time in second

c10). Back azimuth, measured clockwise from the North.

c11). Modulo-90 degree back-azimuth

c12). Event latitude

c13). Event longitude

c14). Event depth

c15). Measurement quality

c16). Longitude of XKS raypiercing point at 200 km depth

c17). Latitude of XKS raypiercing point at 200 km depth