RESEARCH DIRECTED TOWARD THE USE OF LONG-AND INTERMEDIATE-PERIOD SEISMIC WAVES FOR THE IDENTIFICATION OF SEISMIC SOURCES
Abstract
Seismological research supported by Air Force contract AF19(628)-4082 at the Lamont Geological Observatory is summarized for the period 1 August 1966 to 1 August 1967. Several studies of interest to the VELA-UNIFORM program have been completed or carried out during this period. Among these, the study of the relative excitation of body and surface waves by explosions and earthquakes shows that while the two classes of events do not separate into two distinct categories, the explosions generate smaller surface waves than most of the explosions. Further studies of more nuclear explosions and earthquakes for PcP have confirmed the existence of an amplitude minimum near 32.5. Focal mechanism and aftershock studies have cast new light on our knowledge of the earthquake process and seismicity studies, made possible only by the availability of digital data, may enlarge our ideas on the spatial and temporal distribution of seismic sources. A large amount of work in the analysis of LASA data has been carried out during the three months that this work has been funded. Numerous programs have been written to facilitate the data handling problem and studies of the microseism characteristics and the propagation of the waves from the U.S. S.R. event of October 27, 1966 have been initiated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 15, 1967
- Accession Number
- AD0657803
Entities
People
- Maurice Ewing