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Seismic activity in the Sunnyside mining district, Utah, during 1967
Barton K. Barnes, C. Richard Dunrud, Jerome Hernandez
1969, Open-File Report 69-15
A seismic monitoring network near Sunnyside, Utah, consisting of a triangular array of seismometer stations that encompasses most of the mine workings in the district, recorded over 50,000 local earth tremors during 1967. About 540 of the tremors were of sufficient magnitude to be accurately located. Most of these were...
An analysis of gravity data in Area 12, Nevada Test Site
R. R. Wahl
1969, Open-File Report 69-309
The gravity data available from Healey and Miller (1963a) were augmented by new observations along three profiles through two new drill holes in Area 12; UEI2t #1 and UEI2p #1. The data were interpreted to allow evaluation of the geologic structure prior to the planning and excavation of two...
Preliminary geologic interpretation of aeromagnetic data in the Yakutat district, Alaska
Gordon R. Johnson, George Plafker
1969, Open-File Report 69-134
An aeromagnetic survey covering portions of the Yakutat Feveland region in south-central Alaska was made to delineate concentrations of magnetic minerals possibly associated with heavy mineral placers in beach sands and raised beach ridges. However, the larger magnetic anomalies do not correlate with the beach placers in the surveyed area....