ARRAY RESEARCH. ANALYSIS OF VERTICAL ARRAY DATA FROM GRAPEVINE AND UBO
TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV
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During 1965, deep-well seismic records were obtained from the Trigg well near Grapevine, Texas, and the Carter well at the Uinta Basin Seismological Observatory near Vernal, Utah. Data of interest to the present study are discussed in this special report. At Grapevine, the array consisted of a vertical-component seismometer at the surface six vertical-component seismometers locked into the well at depths of 3500, 4500, 5500, 6500, 7500, and 8500 ft and two horizontal-component seismometers at the surface. High-gain recordings of the above instruments were made using channels 1 through 9, respectively, and simultaneous low-gain recordings were made with channels 10 through 18, respectively. At UBO, outputs were recorded from a vertical- component seismometer at the surface, a north-south seismometer at the surface, an east-west seismometer at the surface, and six vertical-component seismometers locked into the well at depths of 3900, 4900, 5900, 6900, 7900, and 8900 ft. The outputs of these nine instruments were recorded in channels 21 through 29, respectively. Low-gain recordings were made in order to obtain teleseismic records which did not overmodulate. High-gain recordings were made to produce noise samples with maximum dynamic range.