LLNL Middle East, North Africa and Western Eurasia Knowledge Base
The Lawrence Livermore National Laboratory (LLNL) Ground-Based Nuclear Event Monitoring (GNEM) program has made significant progress populating a comprehensive Seismic Research Knowledge Base (SRKB) and deriving calibration parameters for the Middle East, North Africa and Western Eurasia (ME/NA/WE) regions. The LLNL SRKB provides not only a coherent framework in which to store and organize very large volumes of collected seismic waveforms, associated event parameter information, and spatial contextual data, but also provides an efficient data processing/research environment for deriving location and discrimination correction surfaces. The SRKB is a flexible and extensible framework consisting of a relational database (RDB), Geographical Information System (GIS), and associated product/data visualization and data management tools. This SRKB framework is designed to accommodate large volumes of data (almost 3 million waveforms from 57,000 events) in diverse formats from many sources (both LLNL derived research and integrated contractor products), in addition to maintaining detailed quality control and metadata. We have developed expanded look-up tables for critical station parameter information (including location and response) and an integrated and reconciled event catalog data set (including specification of preferred origin solutions and associated phase arrivals) for the PDE, CMT, ISC, REB and selected regional catalogs. Using the SRKB framework, we are combining traveltime observations, event characterization studies, and regional tectonic models to assemble a library of ground truth information and phenomenology (e.g. travel-time and amplitude) correction surfaces required for support of the ME/NA/WE regionalization program. We also use the SRKB to integrate data and research products from a variety of sources, such as contractors and universities, to merge and maintain quality control of the data sets. Corrections and parameters distilled from the LLNL SRKB provide essential contributions to the National Nuclear Security Administration Knowledge Base (NNSA KB) for the ME/NA/WE region and will improve capabilities for underground nuclear test monitoring. The LLNL research products will facilitate calibration of International Monitoring System (IMS) stations (primary and auxiliary), their surrogates (if not yet installed) and selected gamma stations necessary to complete the ME/NA/WE regionalization efforts. In addition to an overview of selected individual research products, we present an overview of our visualization, integration, validation, and organizational processes. Development of these processes and the LLNL SRKB was necessitated by both the very large amount of data and information involved, over 2 terabytes, and the varied data and research result formats utilized. Products assembled, integrated and validated using the LLNL SRKB are grouped into 5 major categories: (1) Reference and contextual information; (2) Detection data; (3) Calibration and ground truth data; (4) Event location products; and (5) Event identification products.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15013225
- Report Number(s):
- UCRL-JC-143945; TRN: US200604%%177
- Resource Relation:
- Conference: 23rd Department of Defense/Department of Energy Seismic Research Review, Jackson Hole, WY, Oct 02 - Oct 05, 2001
- Country of Publication:
- United States
- Language:
- English
Similar Records
LLNL Middle East and North Africa and Former Soviet Union Research Database
LLNL Middle East and North Africa research database