LONG-RANGE SEISMIC MEASUREMENTS PROGRAM PARTICIPATION IN PROJECT EARLY RISE.
Abstract
Portable Seismograph Systems, operating under the Long-Range Seismic Measurements Program (LRSM), occupied and recorded data from 77 temporary sites during the 21-day Project EARLY RISE experiment. As was anticipated, the portable systems were operationally well-suited for the quick set-up time required by the shot schedules in this program. Site selection was performed by the systems' operators rather than by an advance site selection team. The tolerance on site locations was + or -5 km. The magnetic-tape data recorded during the experiment were played out on visual records and sent to the project investigators. Data recorded by the 16 LRSM mobile observatories were also made available. A preliminary plot of travel times versus distance (from near-regional to teleseismic) over two profile lines in Canada indicates a constant P-wave velocity of 8.46 km/sec. Seismograms from selected EARLY RISE events, recorded by both the mobile observatories and the systems, are appended to this report. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 06, 1967
- Accession Number
- AD0807661
Entities
People
- Darrell C. Rasmussen
- Ray G. Reakes
Organizations
- Geotech Instruments (United States)