| Earthquake Focal Mechanisms in Northeastern China and Korea Determined by the Grid Search Algorithm |
29 AUG 96 |
31 pages |
| Authors:
John J. Cipar; PHILLIPS LAB HANSCOM AFB MA
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 | The grid search algorithm for determining earthquake focal mechanism and depth is tested by inverting regional-distance seismograms for a suite of five earthquakes in northeastern China and Korea. An improved crustal model for the region is used to compute the synthetic Green's functions for the eight fundamental fault types. To account for uncertainty in timing, location, and crustal structure, the synthetics are time shifted during the inversion to produce the ... |
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| Data Report for the 1995 Wind River Mountains - Green River Basin Seismic Refraction Profile |
23 MAY 96 |
24 pages |
| Authors:
Stephan H. Koester; John J. Cipar; PHILLIPS LAB HANSCOM AFB MA
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| During August, 1995, the Earth Sciences Division of Phillips Laboratory (PL/GPE) recorded a seismic refraction profile across the Wind River Mountains and adjacent Green River Basin using controlled explosions fired east of Lander, Wyoming, as part of the Deep Probe experiment. The Deep Probe Experiment was an ultra-large scale active seismic profile carried out by several US and Canadian universities and the Canadian Geological Survey with the goal of imaging ... |
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| A Grid Search Algorithm to Determine Earthquake Source Parameters. Application to the 1992 Yellow Sea, China, Earthquake |
08 JUN 95 |
30 pages |
| Authors:
John J. Cipar; PHILLIPS LAB HANSCOM AFB MA
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| A grid search method has been implemented to determine earthquake focal mechanism and source depth using a set of Green's functions computed for a representative continental crustal structure. The method directly compares observed and synthetic waveforms through a misfit function. selecting as the result the model with the lowest misfit. The method has been tested with synthetic data and with CDSN long period (LH band) observations of the 1992 Yellow ... |
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| Proceedings of the Annual Seismic Research Symposium (16th) Held in Thornwood, New York on 7-9 September 1994 |
08 AUG 94 |
423 pages |
| Authors:
John J. Cipar; James F. Lewkowicz; Jeanne M. McPhetres; PHILLIPS LAB HANSCOM AFB MA
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| These Proceedings contain papers presented at the Sixteenth Annual Seismic Research Symposium held 7-9 September 1994, in Thornwood, New York. This Symposium represents the combined annual review for the seismic verification research programs funded by the Air Force Phillips Laboratory, PL/GPE and the Air Force Office of Scientific Research, AFOSR/NM. The scientific objectives of the research programs are to improve the Air Force's capability to seismically detect, locate, identify, and ... |
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| Seismic Recordings in the Northeastern United States of the Shagan River Nuclear Test of 14 September 1988 |
07 JAN 91 |
46 pages |
| Authors:
James C. Battis; John J. Cipar; PHILLIPS LAB HANSCOM AFB MA
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| On 14 September, the USSR conducted an announced nuclear test as part of the US-USSR Joint Verification Experiment (JVE) called for in the protocols of the Threshold Test Ban Treaty of 1974. The test, code named SHAGAN, was detonated at the Shagan River test area in eastern Kazakh SSR. For this nuclear test, a small-aperture array in New Hampshire and a small five station network located in the Adirondack Mountains ... |
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