Accession Number:

AD0843477

Title:

Long-Period Triaxial Seismograph Development

Descriptive Note:

Quarterly technical rept. no. 9, Jul-30 Sep 1968

Corporate Author:

GEOTECH GARLAND TX

Personal Author(s):

• Kirkpatrick, B. M.
• Simmons, A. W.

Report Date:

1968-10-28

Pagination or Media Count:

26.0

Abstract:

The spectra and coherence of the noise as recored by the triaxial and long-period seismographs at UBSO were computed. Plots of the amplitude ratio or spectra ratio and coherency of the noise are presented. Comparison of the amplitude ratio plots, from the recordings for wind free and windy days, indicates that the wind induced noise is attenuated, but not completely eliminated with the burial of a seismometer. Assembly of the redesigned module is complete. The module has been tested and found to operate according to the design intent. The drawing package required to fabricate the production prototype seismometer is expected to be released during mid-October. Assembly of the seismometer is expected to begin during the month of December.

Descriptors:

• *SEISMOLOGICAL STATIONS
• AMPLIFIERS
• CONSTRUCTION
• DETECTION
• EARTHQUAKES
• NOISE
• NUCLEAR EXPLOSIONS
• POWER SPECTRA
• RESPONSE
• SEISMIC WAVES
• SEISMOMETERS
• UNDERGROUND STRUCTURES
• UTAH
• WIND

Subject Categories:

• Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE