Global Ground Truth Data Set with Waveform and Improved Arrival Data
Abstract
The main objective of this three-year research project is to produce a quality-controlled global GTO-5 event set, accompanied with waveform and groomed arrival time data sets. Our efforts are directed toward developing and refining methodologies for generating new ground-truth(GT) events through multiple-event location analysis. To accomplish this goal, we have developed the hybrid HDC-RCA (hypocentroidal decomposition and reciprocal cluster analysis) methodology. The HDC analysis determines accurate event location patterns relative to a provisional cluster centroid using regional and telesesmic phases. The RCA analysis then determines the accurate location of the cluster centroid using local phases only. RCA accomplishes this by keeping the event and station patterns fixed and relocates the station centroid using the events as fictitious stations. Because both relative station and relative event patterns are fixed and multiple events are typically recorded at each station, solving for the cluster hypocentroid represents an over determined inversion problem that is robust with respect to strong local seismic-velocity biases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 29, 2006
- Accession Number
- ADA469462
Entities
People
- Ben Kohl
- Eric Bergman
- Eric R. Engdahl
- Hans Israelsson
- Istvan Bondar
- Jeff Given
- Keith Mclaughlin
- Yu-long Kung
Organizations
- Leidos