HR: 14:55h
AN: G23A-06    [Abstracts]
TI: The combined EarthScope data set at the IRIS DMC
AU: * Trabant, C
EM: chad@iris.washington.edu
AF: IRIS Data Management Center, 1408 NE 45th Street, Seattle, WA 98105, United States
AU: Sharer, G
EM: gillian@iris.washington.edu
AF: IRIS Data Management Center, 1408 NE 45th Street, Seattle, WA 98105, United States
AU: Benson, R
EM: rick@iris.washington.edu
AF: IRIS Data Management Center, 1408 NE 45th Street, Seattle, WA 98105, United States
AU: Ahern, T
EM: tim@iris.washington.edu
AF: IRIS Data Management Center, 1408 NE 45th Street, Seattle, WA 98105, United States
AB: The IRIS Data Management Center (DMC) is the perpetual archive and access point for an ever-increasing variety of geophysical data in terms of volume, geographic distribution and scientific value. A particular highlight is the combined data set produced by the EarthScope project. The DMC archives data from each of the primary components: USArray, the Plate Boundary Observatory (PBO) & the San Andreas Fault Observatory at Depth (SAFOD). Growing at over 4.6 gigabytes per day, the USArray data set currently totals approximately 5 terabytes. Composed of four separate sub-components: the Permanent, Transportable, Flexible and Magnetotelluric Arrays, the USArray data set provides a multi-scale view of the western United States at present and the conterminous United States when it is completed. The primary data from USArray are in the form of broadband and short-period seismic recordings and magnetotelluric measurements. Complementing the data from USArray are the short- period, borehole seismic data and borehole and laser strain data from PBO. The DMC also archives the high- resolution seismic data from instruments in the SAFOD main and pilot drill holes. The SAFOD seismic data is available in two forms: lower-rate monitoring channels sampled at 250 hertz and full resolution channels varying between 1 and 4 kilohertz. Beyond data collection and archive management the DMC performs value-added functions. All data arriving at the DMC as real-time data streams are processed by QUACK, an automated Quality Control (QC) system. All the measurements made by this system are stored in a database and made available to data contributors and users via a web interface including customized report generation. In addition to the automated QC measurements, quality control is performed on USArray data at the DMC by a team of analysts. The primary functions of the analysts are to routinely report data quality assessment to the respective network operators and log serious, unfixable data issues for reference by data users. All of these data are managed in a unified SEED format archive and are seamlessly available to data users via the DMC's&pstandard data access methods along with all the other data managed by the DMC. The only exception is high resolution, special case SAFOD seismic data that is retained in its original SEG-2 format as an assembled data set. A data user can choose between a handful of data access methods ranging from simple email requests to technologically advanced CORBA-based access, streamlining the "information into application" philosophy. Currently totally over 8.5 terabytes and growing, the combined EarthScope data at the DMC provides an unparalleled, multi-measurement record of geophysical information ideal for determining Earth structure and processes in the United States and beyond. A website is maintained to provide current information regarding EarthScope data at the DMC: http://www.iris.edu/earthscope/.
DE: 7200 SEISMOLOGY
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Geodesy [G]
MN: 2007 Fall Meeting