Depth and source mechanism estimation for special event analysis, event screening, and regional calibration
We have summarized the advantages and disadvantages of a variety of techniques for depth and mechanism estimation and suggest that significant work remains to be done for events with magnitudes of interest for test ban monitoring. We also describe a new, waveform modeling-based tool for fast and accurate, high-resolution depth and mechanism estimation. Significant features of this tool include its speed and accuracy and its applicability at relatively high frequencies. These features allow a user to rapidly determine accurate, high-resolution depth estimates and constraints on source mechanism for relatively small magnitude (mb-4.5) events. Based on the accuracy of depth estimates obtained with this tool, we conclude it is useful for both the analysis of unusual or suspect events and for event screening. We also find that this tool provides significant constraints on source mechanism and have used it to develop ''ground-truth'' estimates of depth and mechanism for a set of events in the Middle East and North Africa. These ''ground-truth'' depths and mechanisms should be useful for regional calibration.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 14578
- Report Number(s):
- UCRL-JC-134309; GC0402000; GC0402000; TRN: AH200129%%323
- Resource Relation:
- Conference: 21st Seismic Research Symposium: Technologies for Monitoring the Comprehensive Nuclear Test Ban Treaty, Las Vegas, NV (US), 09/21/1999--09/24/1999; Other Information: PBD: 23 Jul 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
UTILIZING RESULTS FROM INSAR TO DEVELOP SEISMIC LOCATION BENCHMARKS AND IMPLICATIONS FOR SEISMIC SOURCE STUDIES
LLNL's 3-D A Priori Model Constraints and Uncertainties for Improving Seismic Location