Accession Number:

AD0850352

Title:

Application of a Vertical Strain Seismograph to the Enhancement of P Waves.

Descriptive Note:

Technical rept.,

Corporate Author:

GEOTECH GARLAND TX

Personal Author(s):

• Shopland, Robert C.
• Kirklin, Richard H.

Report Date:

1969-03-12

Pagination or Media Count:

41.0

Abstract:

Enhancement of P waves is obtained by the suppression of microseisms with a combination of vertical linear strain seismograph and vertical inertial seismograph outputs. Significant suppression is observed at sites where the predominant microseisms consist of essentially single-mode Rayleigh waves in contrast to that observed at a site where the microseismic noise is compositionally more complex. A description is given of the vertical linear strain seismograph used in these investigations. Consideration is given to the use of a vertical transverse strain seismograph at sites where the microseismic noise field is complex. Author

Descriptors:

• (*SEISMOLOGICAL STATIONS
• NOISE)
• (*UNDERGROUND EXPLOSIONS
• DETECTION)
• MICROSEISMS
• POWER SPECTRA
• SEISMOMETERS
• PHASE STUDIES
• AMPLITUDE MODULATION
• NUCLEAR EXPLOSIONS
• RESPONSE
• SEISMIC WAVES
• FREQUENCY
• RAYLEIGH WAVES
• EARTHQUAKES
• RECORDING SYSTEMS
• OKLAHOMA

Subject Categories:

• Seismology
• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE