DEPTH OF FOCUS DISCRIMINATION BY CRUSTAL PHASES FOR NTS NUCLEAR EXPLOSIONS. Research Paper P-12
Time residuals for Pg--Pn intervals as a function of epicentral distance and Sg- Pa intervals are examined for calibrated' source-to-recording-station paths. At some stations, it is found that the residuals are reduced by about one- half when true epicentral distance is used. Depths of foci for 16 nuclear explosions are estimated from Pg- Pn residuals. When the average is taken for depth estimates from three or more recording stations, the results are within 16 km of the surface. Depths computed from single stations may be as much as 30 km in error. The greatest source of error is in reading arrival times of the Pg phase with sufficient accuracy from LRSM three-component recordings. (auth)
- Research Organization:
- Institute for Defense Analyses, Washington, D.C.
- NSA Number:
- NSA-18-012335
- OSTI ID:
- 4112897
- Report Number(s):
- IDA/HQ-63-1345; AD-406082
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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