Changes between Version 1 and Version 2 of HowTo/LocalMagnitudeFormula


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Timestamp:
07.02.2013 14:18:15 (7 years ago)
Author:
MarcusWalther
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  • HowTo/LocalMagnitudeFormula

    v1 v2  
    33Seismic Handler in version 2013a support a new analytical formula for local magnitude estimation (Richter magnitude). Whereas the ''classic'' mode (default) uses tabulated values for distance correction, the IASPEI recommended formula reads as 
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     5[[Image(ml.png)]] 
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    67 * ''D'' is distance in kilometers and  
     
    1112The resulting magnitudes may show quite large differences. The next figure displays the offset between the formulas: 
    1213 
     14[[Image(deviation.png)]] 
    1315 
    1416One can easily see, that the systematic offset varies between -0.2 and 0.4 magnitude units.