Accession Number:

AD0871116

Title:

Statistical Discrimination

Descriptive Note:

Quarterly rept. no. 2, 1 Dec 1969-31 Mar 1970

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS SERVICES GROUP

Personal Author(s):

Report Date:

1970-04-15

Pagination or Media Count:

50.0

Abstract:

A new and larger learning ensemble was assembled to better represent the area under study and to better represent the two classes of events statistically. The effectiveness of various short-period statistics for discrimination was studied. Higher-order surface modes were sought in two-long- period spectral peaks measured over short- Higher-order surface modes were sought in two long-period events by obtaining estimates of group velocity from maximum-entropy spectral peaks measured over short time gates of the seismogram. Definition of the fundamental Rayleigh mode was good, and possible higher-mode energy was indicated. Matched filtering was performed on a suite of long-period explosion recordings. Chirp filters worked almost as well as master events.

Descriptors:

• *SEISMOLOGICAL STATIONS
• *UNDERGROUND EXPLOSIONS
• ALASKA
• DETECTION
• EARTHQUAKES
• ELECTROMAGNETIC WAVE FILTERS
• JAPAN
• MONTANA
• NOISE
• NORWAY
• NUCLEAR EXPLOSIONS
• POWER SPECTRA
• RAYLEIGH WAVES
• SEISMOMETERS
• SIGNAL TO NOISE RATIO
• SPECTRUM SIGNATURES
• STATISTICAL ANALYSIS

Subject Categories:

• Seismology
• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE