Deep-Hole Seismometer
Abstract
Surface noise was measured at 25 locations and used as an aid in the selection of deep-well sites. Four deep-well sites were found with amplitudes sufficiently low to make them worth further consideration. Field measurements were made at deep-well sites near Orlando, Florida, on Eniwetok Atoll, and near Apache, Oklahoma. A deep-well site at the Uinta Basin Seismological Observatory, Vernal, Utah, was located and prepared for use. Data recorded at the deep-well sites were visually analyzed and spectral analyses were made of the magnetic- tape recordings. Theoretical work was done at the Data Analysis and Technique Development Center (DATAC) using measured and assumed velocities of the layers of earth at the well sites. Comparison of the theoretical results with those of the measurement program suggests the need to consider layers much deeper in the earth than previously believed necessary. A processing system was developed to permit summation, filtering, or delaying of signals recorded from two seismometers. Signals recorded from two seismometers in the well at the Grapevine test site were processed with the system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1963
- Accession Number
- AD0431021