SeismicHandler - Waveform Analysis Tool

Menu entry MS Prague

Determination of surface wave magnitude. Needs measurement of amplitude of one or more S waves before. These S amplitude measurements are usually done on SRO-LP simulated seismograms. The steps to perform to get an MS magnitude are:

The MS magnitudes are determined from all S amplitudes found using the Prague formula:

ms = log10(ampl/period) + 1.66*log10(distance) + 3.3

Depending on the epicentral distance there is a minimum period of the signal used for amplitude measurement. Periods smaller than this minimum period are not accepted.

This page last modified 26-Jul-2000