Surface wave magnitude

The surface wave magnitude scale (MS, of English surface wave magnitude ) is a method for measuring earthquake magnitudes. It is based on the study of the movement of the surface by means of Rayleigh waves with a period T of 20 ± 2 seconds.

Beno Gutenberg developed in 1945 following dimensionless parameter for teleseismic surface waves:

The coefficients are:

  • Is the maximum horizontal motion of the surface measured on the seismogram in microns at a period T of 20 ± 2 seconds for the north-south or east-west components,
  • The distance of the place of measurement from the epicenter measured in degrees and
  • A calibration function as the inverse of a semi-empirically determined relationship between and. Charles Francis Richter certain 1958 a table of values ​​for.

Sergei Leonidovich Solovyov suggested in 1955 the use of the maximum ground particle velocity before, reflecting the seismic energy better.

Today's scale, called Moscow - Prague formula, was formulated in 1962 by Vít Kárník as:

This formula is valid only for and earthquake with a focal depth of 50 km or less.

The surface wave magnitude scale has a saturation MS = 8.5.

Source

  • Peter Bormann: 3.2 Magnitude of seismic events. In: Peter Bormann (Ed.): New Manual of Seismological Observatory Practice NMSOP. revised edition. GFZ German Research Centre for Geosciences, Potsdam 2009, ISBN 3-9808780-0-7, pp. 30-31, 48, doi: 10.2312/GFZ.NMSOP_r1_ch3.

Intensity scales European macroseismic scale ( EMS) | Environmental Seismic Intensity Scale - ESI 2007 ( INQUA Scale ) | Chinese seismic intensity scale ( Liedu ) | Medvedev Sponheuer - Karnik scale ( MSK) | Modified Mercalli scale (MM ) | JMA scale ( Shindo ) | Sieberg scale

Magnitude scales Codamagnitude Md | Energiemagnitude ME | Einheitsmagnitude m | JMA magnitude Mj / Mjma | local magnitude ( Richter scale ) ML | Mantelmagnitude Mm | moment magnitude MW | Oberflächenwellenmagnitude MS | Raumwellenmagnitude mB and mb ( short periodic)

Historic scales Mercalliskala | Mercalli - Sieberg Cancani scale ( MCS ) | Mercalli -Wood - Neuman - scale ( MWN ) | Medvedev scale ( GEOFIAN scale) | Ōmoriskala | Rossi - Forel scale ( RF)

  • Earthquake scale
Depth of focus (tectonics) Digital Object Identifier Seismic scales Japan Meteorological Agency seismic intensity scale Mercalli intensity scale Rossi–Forel scale
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