Accession Number : ADA258040


Title :   Path-corrected Body-wave Magnitudes and Yield Estimates of Semipalatinsk Explosions


Descriptive Note : Semi-annual rept. no.1, 23 Aug 1991-4 Apr 1992


Corporate Author : TELEDYNE GEOTECH ALEXANDRIA VA ALEXANDRIA LABS


Personal Author(s) : Jih, Rong-Song ; Wagner, Robert A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258040.pdf


Report Date : 04 Apr 1992


Pagination or Media Count : 79


Abstract : Along with an extensive data set of worldwide explosions recorded at WWSSN, teleseismic short-period body-wave amplitudes from 92 Semipalatinsk explosions are measured and processed with an inversion scheme which simultaneously determines the propagation path effect, the source size, and the receiver amplification. Partitioning a test site (such as Balapan) into several source regions according to the geological and geophysical characteristics and then applying the (highly regional) path corrections on top of the station corrections reduces the fluctuational variation across the network significantly, thereby resulting in a very favorable source estimator. For Semipalatinsk events in our WWSSN database, the new mb factoring procedure provides more stable mb measurements across the whole recording network with a reduction in the fluctuational variation by a factor of up to 3. The Kazakh-NTS mb bias at 50 KT level is inferred as 0.36 magnitude unit. Based on the first motion of the P wave alone, our yield estimate of Soviet JVE (09/14/88) is 113 KT and that of the cratering event on 01/15/65 at Balapan test site is 111 KT, which are in excellent agreement with estimates derived by other means. A strong correlation between P-wave amplitude and Lg detection at teleseismic distance is also observed.


Descriptors :   *NUCLEAR EXPLOSIONS , *MODELS , *EXPLOSIONS , TEST AND EVALUATION , STATIONS , MEASUREMENT , SITES , CRATERING , ESTIMATES , AMPLITUDE , AMPLIFICATION , AGREEMENTS , INVERSION , YIELD , RECEIVERS , CORRELATION , VARIATIONS , REDUCTION , CORRECTIONS , BODIES , BIAS , REGIONS , MOTION , PATHS , NETWORKS , DETECTION , PROPAGATION , DATA BASES


Subject Categories : Nuclear Explosions and Devices(non-military)


Distribution Statement : APPROVED FOR PUBLIC RELEASE