The Searchable Product Depository (SPUD) is the IRIS DMC's primary data
product management system. Complementing the DMC's SEED and assembled
data archives, which contain time series recordings, the SPUD system
primarily contains derivative data products of other types (images,
movies, etc.) created either at the DMC or by members of the community.
For users SPUD is the query and access point for these products. The
web interfaces allow users to search for products using customized queries
across product and event details. Users can search across all product
types at once or within specific product types. SPUD also has web service
interfaces for programmatic discovery and access to the data products.
If any products from SPUD are used in your research please be sure to cite
the identified author of the product and the IRIS DMS
[Citation Information].
About SWS Measurements
The shear-wave splitting (SWS) databases data product provides the
geosciences community with an easy access to two published
databases:
The Géosciences Montpellier SplitLab’s Shear-wave splitting
database (...more)
The Missouri University of Science and Technology (Missouri S&T) shear-wave
splitting database for western and central United States
(...more)
About SWS Measurements
Effect of the media anisotropy on an incoming shear wave may manifest itself as splitting it into two polarized shear waves of different velocities (Shear wave splitting, SWS). Polarization of the resulting "fast" wave and the delay between the "fast" and "slow" waves provide information on the orientation and the intensity of the seismic anisotropy of the media.
Shear wave splitting has been studied in many areas of the earth and access to the results of such studies is a valuable tool for
geoscientists to understand the structure and dynamics of the Earth.
The Shear-wave splitting database
is an initiative taken by the Géosciences Montpellier to make the published SWS data easily available to the geosciences
community in a homogeneous format.
IRIS, in collaboration with the Géosciences Montpellier, is mirroring their database and providing access to it via IRIS' Searchable Product Depository (SPUD) interface and a customized interactive map. This mirrored database is synchronized with the Géosciences Montpellier's database on a daily basis and contains the following fields:
Station*
station code
Latitude*
station latitude
Longitude*
station longitude
phi*
fast polarization direction
dt*
delay time
refID*
SWS measurement reference
Phase*
seismic phase used for SWS measurement
pmax
relative fast axis error (upper limit)
pmin
relative fast axis error (lower limit)
dtmax
relative delay time error (lower limit)
dtmin
relative delay time error (upper limit)
remark
remarks
* fields displayed in SPUD interface
Citing Shear-wave Splitting Products
If you use the SplittingDataBase data in publications please cite:
Wüstefeld, A.; Bokelmann, G. H. R.; Barruol, G.; Montagner, J.-P. (2009)
"Identifying global seismic anisotropy patterns by correlating shear-wave
splitting and urface waves data" , Phys. Earth Planet. Int, 176 (3-4), 198-212,
doi:10.1016/j.pepi.2009.05.006
If you use the data or maps from this site in publications please cite:
Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern and R.
Aster (2012), Data products at the IRIS DMC:
stepping-stones for research and other applications, Seismological Research Letters, 83(6), 846:854.
doi: 10.1785/0220 120032
Product Query Help
This page queries for Shear Wave Splitting products.
Navigate (pan and zoom) in map to control latitude and longitude query criteria.
Draw Selection Box button allows fine tuning of bounding box
Latitude and longitude text input boxes allow full control of selection box
Station input field limits results to those stations matching entered text.
Download button will return a zip file containing all items matching current
criteria or only selected items (if any are selected via leftmost column)
Download request too large
Requested download count exceeds maximum size (200) for this product.
