ISSN:
1365-246X
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
Notes:
Magnitudes, mb(Lg), based on RMS amplitudes of Lg waves recorded at nine internal Soviet stations for 83 underground nuclear explosions at the Semipalatinsk test range were analysed. Network magnitudes based on a combination of station magnitudes were formed as weighted averages over the station magnitudes after adjusting for variations among station magnitudes in scaling with source strength. Combining the station magnitudes into network magnitudes, although the number of stations was small (less than six), appeared to reduce scatter in magnitude-yield relations. The correlation between network mb(Lg) and announced explosion yields was very high, and mb(Lg) closely approximated simple proportionality with the logarithm of yield throughout the yield interval 2–165 kt. The error of misfit was about 0.04 magnitude units excluding data for the explosion of 1972 August 16 (8 kt at 139m), the yield of which appeared high compared to mb(Lg). The close correlation between network mb(Lg) and explosion yield, together with the fact that several of the explosions were not at scaled depths, indicates that mb(Lg) may not be critically dependent on depth of burial, at least for depth ranges within a factor of two.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-246X.1994.tb02456.x
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