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Author: L. M. Swift
Publisher:
ISBN:
Category :
Languages : en
Pages : 61
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Author: L. M. Swift
Publisher:
ISBN:
Category :
Languages : en
Pages : 61
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Author: L. M. Swift
Publisher:
ISBN:
Category : Atomic bomb
Languages : en
Pages : 90
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Although predicted strains were higher than those observed, horizontal surface strain results support the conclusion that the principal disturbance on the mesa was confined to a relatively small radius (less than 500 feet) around surface zero. Peak strains measured on the slope are significantly larger than expected at comparable ranges on the mesa.
Author: William R. Perret
Publisher:
ISBN:
Category : Seismology
Languages : en
Pages : 65
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Author: William R. Perret
Publisher:
ISBN:
Category : Nevada National Security Site (Nev.)
Languages : en
Pages : 66
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
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Seismic effects of Rainier, a 1.7-kt nuclear shot detonated 900 feet underground, were measured in terms of ground surface motion at ten strong-motion seismograph stations located 1200 to 45,000 feet from the source. In addition, records were borrowed from seven teleseismic stations located 100 to 300 miles from the source. Recorded accelerations attenuated from a maximum singlecomponent value of 2.6 g at 1280 feet to 0.009 g at 17,640 feet. Gutenberg-Richter magnitude of Rainier, calculated as for a natural earthquake from seven WoodAnderson seismograph records, was 4.6. Earthquakes of 4.6 magnitude are felt up to 60 miles from the epicenter, however, Rainier was felt by only a few observers at 21/2 miles. Seismologists at established teleseismic stations were able to pick out Rainier's elastic wave signature on seismograms at considerable distance. Very small amplitude waves from Rainier were found on the Coast and Geodetic Survey, College, Alaska, seismogram, 3600 km away, although attempts in the eastern United States at distances of 2000 to 3000 km, using conventional instruments, were not successful.
Author: William R. Perret
Publisher:
ISBN:
Category : Nevada National Security Site (Nev.)
Languages : en
Pages : 38
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Author: Dean S. Carder
Publisher:
ISBN:
Category : Operation Plumbbob, Nev., 1957
Languages : en
Pages : 54
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Author: William R. Perret
Publisher:
ISBN:
Category : Operation Plumbbob, Nev., 1957
Languages : en
Pages : 78
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 73
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Particle motion measurements were made within the mesa adjacent to Rainier shot (1.7kt) of Operation Plumbbob on both a horizontal and a vertical radius. Principal information was derived from radial component acceleration data. Horizontal radius data were obtained over a range from 100 feet to 1355 feet from the source; vertical radius data were obtained over a range from 366 feet to the surface at 896 feet. Most of the accelerometers used by Project 26.4b were given set ranges below the actual peak accelerations produced by Rainier. A consequence of this was that many records required use of a nonlinear calibration procedure and a few included peaks truncated by saturation of the recording system. All acceleration data were integrated to particle velocity and displacement information. Peaks were added to truncated records to produce velocity-time data which implied return to zero velocity at a reasonable time after initial motion. Peak horizontal accelerations decay inversely as the fourth power of radial range to about 5g at 500 feet, then progressively as the inverse second and first powers. Peak vertical accelerations decrease as the inverse second power up to the base of the welded tuff (rhyolite) cap rock. Above that point accelerations increase, presumably as a result of reflection phenomena in a medium of decreasing seismic impedance as the surface is approached.
Author: William R. Perret
Publisher:
ISBN:
Category : Underground nuclear explosions
Languages : en
Pages : 120
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