Source and Path Calibration in Regions of Poor Crustal Propagation Using Temporary, Large-Aperture, High-Resolution Seismic Arrays (Postprint). Annual Report 3
Abstract
Broadband seismic data acquired during the Hi-CLIMB experiment were used to study seismic events and path propagation in the Nepal Himalaya and the south-central Tibetan Plateau. Automated hypocenter locations in south-central Tibet were finalized. Refinements included an update of the model used for location based on high-quality manual P- and S-arrival picks from several strong events well recorded at close distances as well as the additional removal of spurious events. The database contains over 22,500 events from June 2004 to August 2005, which characterize the distributed seismicity in south-central Tibet. A subset of ~7,900 events with 25+ arrivals is considered well-located based on kilometer-scale differences relative to manually located events or InSAR constraints. Requiring distance to closest station <=50 km and azimuthal gap <=225 improves depth resolution considerably: events north of the southern Lhasa Block are generally shallow (<20km) while events south of it are either shallow or close to the Moho as observed in previous studies. The database contains over 400 GT5 candidate events; of these, almost 100 satisfy the GT595% criteria.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 04, 2012
- Accession Number
- ADA565598
Entities
People
- Jochen Braunmiller
- John L. Nabelek
- N. S. Carpenter
- Patrick W. Monigle
- W. S. Phillips
Organizations
- Oregon State University