Path-corrected body-wave magnitudes and yield estimates of semipalatinsk explosions. Semi-annual report No. 1, 23 August 1991-4 April 1992
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 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.
- Research Organization:
- Teledyne Geotech, Alexandria, VA (United States). Alexandria Labs.
- OSTI ID:
- 6789000
- Report Number(s):
- AD-A-258040/5/XAB; TGAL--92-05; CNN: F29601-91-C-DB23
- Country of Publication:
- United States
- Language:
- English
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AGREEMENTS
AMPLIFICATION
AMPLITUDES
ARMS CONTROL
ASIA
CHEMICAL REACTIONS
COMPILED DATA
CORRECTIONS
DATA
DETECTION
DEVELOPED COUNTRIES
DISTANCE
EARTHQUAKES
EUROPE
EVALUATION
EXPLOSIONS
GEOLOGIC FORMATIONS
GLOBAL ASPECTS
INFORMATION
MATHEMATICAL MODELS
MOTION
NUCLEAR EXPLOSIONS
NUMERICAL DATA
REDUCTION
SEISMIC EVENTS
SIZE
USSR
VARIATIONS