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Seismological Research Letters; November 2007; v. 78; no. 6; p. 579-590; DOI: 10.1785/gssrl.78.6.579
© 2007 Seismological Society of America
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Origins and Methodology of the Russian Energy K-Class System and Its Relationship to Magnitude Scales

Tatyana G. Rautian and Vitaly I. Khalturin

Kazuya Fujita, Kevin G. Mackey, and Anthony D. Kendall

Department of Geological Sciences
Michigan State University
East Lansing, Michigan 48824 USA
fujita{at}msu.edu
(K.F.)


Figure 1
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  		Figure 1. Index map showing names of and boundaries between regional networks in the former Soviet Union. Other locations mentioned in the text are also labeled.

 

Figure 2
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  		Figure 2. The Rautian (1960) K-class nomogram calibrated for SKM seismometers. Note that the horizontal (distance) scale is not truly logarithmic; see text for explanation. Vertical (sum of amplitudes) axis in microns.

 

Figure 3
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  		Figure 3. First South Kurile K-class nomogram variant calibrated for VEGIK seismometers. Dashed lines represent classification for intermediate focus earthquakes. Vertical axis amplitude in microns (µ), period in seconds.

 

Figure 4
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  		Figure 4. The second Southern Kurile variant nomogram as extended for Kamchatka. Vertical axis amplitude in microns (µ), period in seconds.

 

Figure 5
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  		Figure 5. The 1967 Kurile nomogram calibrated for SK seismometers. Vertical axis amplitude in microns (µ), period in seconds.

 

Figure 6
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  		Figure 6. The current Kamchatka nomogram for SKM seismometers. Dashed lines represent limits of integer determinations. Vertical axis amplitude in microns (µ), period in seconds.

 

Figure 7
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  		Figure 7. Comparison of the nomograms for K=10 between Rautian (1960), Solov'ev and Solov'eva (1967), and Fedotov et al. (1964).

 

Figure 8
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  		Figure 8. Sample orthogonal regression between K-class and ISC magnitude (mb) for the Baikal region.

 

Figure 9
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  		Figure 9. Comparisons of orthogonal regressions between K-class and (A) mb and (B) MS for various regions of the former USSR. Most regressions fall within the shaded region; the mean of those regressions is shown as a black line. Outlier regressions are shown and labeled.

 




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