Short Contributions

Studia Geophysica et Geodaetica

, Volume 35, Issue 4, pp 354-357

Local magnitude, surface wave magnitude and seismic energy

  • Vladimír TobyášAffiliated withGeophysical Institute, Czechosl. Acad. Sci.
  • , Reinhard MittagAffiliated withZentralinstitut für Physik der Erde

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Summary

The local magnitude ML at the seismological station Pruhonice (PRU) was converted into surface wave magnitude MS using the formula MS=−3.2+1.45 ML and the seismic wave energy was estimated using the relation log E (Joule)=1.2+2.0 ML. It was proposed to apply the same conversion formulae at seismological stations Kašperské Hory (KHC) and Berggiesshübel (BRG) where the calibrating functions for local magnitudes were determined for the same set of earthquakes with common reference magnitudes as in the case of the PRU station.