SOURCE PHENOMENOLOGY EXPERIMENTS IN ARIZONA

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The Arizona Source Phenomenology Experiments (SPE) have resulted in an important dataset for the nuclear monitoring community. The 19 dedicated single-fired explosions and multiple delay-fired mining explosions were recorded by one of the most densely instrumented accelerometer and seismometer arrays ever fielded, and the data have already proven useful in quantifying confinement and excitation effects for the sources. It is very interesting to note that we have observed differences in the phenomenology of these two series of explosions resulting from the differences between the relatively slow (limestone) and fast (granodiorite) media. We observed differences at the two SPE sites in ... continued below

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Bonner, Jessie L.; Stump, Brian; Leidig, Mark; Hooper, Heather; Yang, Xiaoning (David); Zhou, Rongmao et al. September 30, 2005.

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The Arizona Source Phenomenology Experiments (SPE) have resulted in an important dataset for the nuclear monitoring community. The 19 dedicated single-fired explosions and multiple delay-fired mining explosions were recorded by one of the most densely instrumented accelerometer and seismometer arrays ever fielded, and the data have already proven useful in quantifying confinement and excitation effects for the sources. It is very interesting to note that we have observed differences in the phenomenology of these two series of explosions resulting from the differences between the relatively slow (limestone) and fast (granodiorite) media. We observed differences at the two SPE sites in the way the rock failed during the explosions, how the S-waves were generated, and the amplitude behavior as a function of confinement. Our consortium's goal is to use the synergy of the multiple datasets collected during this experiment to unravel the phenomenological differences between the two emplacement media. The data suggest that the main difference between single-fired chemical and delay-fired mining explosion seismograms at regional distances is the increased surface wave energy for the latter source type. The effect of the delay-firing is to decrease the high-frequency P-wave amplitudes while increasing the surface wave energy because of the longer source duration and spall components. The results suggest that the single-fired explosions are surrogates for nuclear explosions in higher frequency bands (e.g., 6-8 Hz Pg/Lg discriminants). We have shown that the SPE shots, together with the mining explosions, are efficient sources of S-wave energy, and our next research stage is to postulate the possible sources contributing to the shear-wave energy.

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  • Report No.: WG-2005-02
  • Grant Number: FC03-02SF22638
  • DOI: 10.2172/850553 | External Link
  • Office of Scientific & Technical Information Report Number: 850553
  • Archival Resource Key: ark:/67531/metadc781311

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 30, 2005

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • June 17, 2016, 3:26 p.m.

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Bonner, Jessie L.; Stump, Brian; Leidig, Mark; Hooper, Heather; Yang, Xiaoning (David); Zhou, Rongmao et al. SOURCE PHENOMENOLOGY EXPERIMENTS IN ARIZONA, report, September 30, 2005; United States. (digital.library.unt.edu/ark:/67531/metadc781311/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.