INTERIM REPORT NO. 3, JULY 1964 THROUGH MARCH 1966
Abstract
The progress of the Long-Range Seismic Measurements Program (LRSM) is described. The data contained in the report are categorized along the same lines as the organization of the LRSM program, namely: operations, data processing, equipment modifications, equipment and seismogram evaluation, and special projects. A program was initiated whereby several mobile observatories were transferred from the LRSM Program to other organizations. As a result, the number of observatories within the group was decreased from 39 to 16. Emphasis continues to be placed on the advantages realized by the operation of portable seismograph systems, and during the report period, the six LRSM portable systems were extensively used. Several equipment modifications were incorporated into standard system configuration. These modifications included the installation of remote centering and free-period adjustment units on all long-period seismometers, the installation of one experimental multiconductor cable system and one prototype lightning protection system, the replacement of the tape transport supply motors with a viscous brake type of supply unit, and the installation and integration of telemetry equipment in the LASA and TFSO extended Array observatories. The established equipment and seismogram evaluation programs continued to lend important support to the field teams. These efforts have been a major causal factor in the professional status achieved by the field personnel. The number and variety of specialized uses to which LRSM data can be put have grown steadily.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 15, 1966
- Accession Number
- AD0807663
Entities
People
- Darrell C. Rasmussen
Organizations
- Geotech Instruments (United States)