Accession Number:

AD0743077

Title:

Combinations of Strain and Pendulum Seismographs to Enhance Long Period P and Rayleigh Waves at Queen Creek, Arizona

Descriptive Note:

Corporate Author:

TELEDYNE GEOTECH ALEXANDRIA VA SEISMIC DATA LAB

Personal Author(s):

• Woolson, J. R.

Report Date:

1972-03-09

Pagination or Media Count:

51.0

Abstract:

Analog analysis techniques have been applied to the long-period peak response at 25 seconds period strain and pendulum system at QCAZ Queen Creek, Arizona. The purpose is to determine the effectiveness period P wave and Rayleigh wave signals from earthquakes. The long-period pendulum instruments at QCAZ are used as a standard for comparison. Outputs of the strain and pendulum seismographs are combined using an analog computer. The resultant output is then compared for a sample of forty-four earthquakes to the appropriate pendulum to establish signal-to-noise ratio gain or loss. The lack of reduction of the rms noise amplitude is principally a result of strain system noise at periods greater than 16 seconds.

Descriptors:

• *SEISMOLOGICAL STATIONS
• *UNDERGROUND EXPLOSIONS
• ARIZONA
• DATA PROCESSING
• DETECTION
• EARTHQUAKES
• EPICENTERS
• MATHEMATICAL MODELS
• MICROSEISMS
• NUCLEAR EXPLOSIONS
• RAYLEIGH WAVES
• SEISMOMETERS
• SIGNAL TO NOISE RATIO

Subject Categories:

• Seismology
• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE