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A regional magnitude scale für Central Europa based on crustal wave attenuation

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Wahlström,  Rutger
2.6 Seismic Hazard and Stress Field, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Strauch,  W.
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Citation

Wahlström, R., Strauch, W. (1984): A regional magnitude scale für Central Europa based on crustal wave attenuation, (Seismological Section Report; 3-84).


https://gfzpublic.gfz-potsdam.de/pubman/item/item_232385
Abstract
Using Sg-amplitudes measured at GDR and Czechoslovak stations from earthquakes in Central Europe and the surrounding area, and magnitudes given by various stations and agencies for the same events, calibration functions modelled to contain separated components of geometrical spreading (r"SUP -n") and anelastic attenuation (e"SUP -br/T") have been derived. Obtained b-values show significant variation for different spreading types, but surprisingly small scatter, for any given spreading type, for different geographical regions (sectors). Derives a magnitude formula applicable to short-period vertical-component seismograph readings at stations BRG, CLL, MOX, KHC and PRU. Epicentral distances should be greater than 100 km. The attenuation of Sg- waves in the Central European crust can be described by a mean value of Q = 230. -after Authors