Accession Number:

AD0768987

Title:

Simultaneous Three-Component Broad-Band Earth Noise Structure at Very Long Period Experiment Stations Special Report No. 10. Extended Array Evaluation Program,

Descriptive Note:

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS EQUIPMENT GROUP

Personal Author(s):

Report Date:

1973-06-29

Pagination or Media Count:

54.0

Abstract:

A series of one-hour seismic noise samples were collected during 1971 and 1972 on the vertical, North-South, and East-West components of the VLPE seismographs. The results of converting these samples to root mean square ground motion estimates, averaging the conversions, and computing inter-component cross-correlations across the 13.5 to 62.5 second period are presented. The results of the study show that the power across the band is not highly correlated among components, that the RMS ground motions approximate a log normal as opposed to normal distribution, and that the vertical noise field has a lower longterm average than the horizontal field. The noise window at periods between 20 and 40 seconds also appears to be narrower for the horizontal field than the vertical field. Author

Subject Categories:

  • Seismology
  • Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE