Comparisons between uphole and downhole seismograms at RSNY and RSSD

Technical Report · Sun May 01 00:00:00 EDT 1983

OSTI ID:6240828

Rodgers, P W; Broadwater, C W

An independent confirmation has been made of the accuracy of seismograms from RSNY and RSSD by comparing downhole RSTN data with simultaneous uphole wellhead surface recordings. To make an exact comparison, the broadband downhole data was filtered through the transfer function of the uphole and downhole vertical components at RSNY, whereas the agreement between the uphole and downhole horizontal components was only moderately good. These tests confirm the fidelity (seismic accuracy) of the seismograms from RSNY. Large continuous high frequency surface noise at approximately 6 Hz on the vertical component and approximately 3 Hz on the horizontal component was found at RSNY. This noise also appears downhole on the RSTN with moderate .03 to 0.5 nm average pk-pk amplitudes. A similar comparison of uphole and downhole data was made at RSSD using array data from the NTS nuclear explosion Nebbiolo. Again the uphole and downhole vertical components were in excellent agreement. There was also moderate 5 Hz horizontal surface noise at RSSD which appeared downhole with .5 nm average pk-pk amplitude.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6240828
• Report Number(s): UCID-19798; ON: DE83012733
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
SEISMOGRAPHS
ACCURACY
PERFORMANCE TESTING
BOREHOLES
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
FIELD TESTS
NEVADA TEST SITE
SEISMIC DETECTION
CAVITIES
DATA
DETECTION
INFORMATION
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
SEISMIC ARRAYS
SEISMIC DETECTORS
TESTING
US DOE
US ORGANIZATIONS
580203* - Geophysics- Geophysical Survey Methods- (1980-1989)
450300 - Military Technology
Weaponry
& National Defense- Nuclear Explosion Detection