Accession Number:

AD0728210

Title:

Seismic Discrimination

Descriptive Note:

Semiannual technical summary rept. 1 Jan-30 Jun 1971

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1971-06-30

Pagination or Media Count:

70.0

Abstract:

Progress in the definition of spectral characteristics of explosions and earthquakes and in the determination of their time functions is reported. The complexities of surface wave and body wave propagation in a heterogeneous Earth are further considered, and the coherence of seismic signals is discussed with reference to different mantle regions. A technique for computing signals reflected from transition layers is given. The first NORSAR data show travel- time anomalies much more complex than coud be associated with sub-NORSAR structure. NORSAR spectraforms are described for several Asian events. A transfer function technique is used to determine sub-LASA structure. Significance tests for Vespagram and Beamsplit displays are described. Upgrading of the Lincoln data analysis facilities is reported.

Subject Categories:

  • Seismology
  • Seismic Detection and Detectors
  • Operations Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE