Duration magnitudes for Swedish earthquakes

Wahlström, Rutger

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Duration magnitudes for Swedish earthquakes

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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;

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Wahlström, R. (1979): Duration magnitudes for Swedish earthquakes, (Report 5/79).

https://gfzpublic.gfz-potsdam.de/pubman/item/item_232361

Abstract

By calibration with the M"SUB L"-scale for Fenno-scandian earthquakes, a regional magnitude formula for Swedish earthquakes based on signal duration is developed for each of the six stations of the Swedish Seismography Station Network. Derived formulae are of the type M"SUB tau" = C"SUB 1" + C"SUB 2" (log tau)"SUP 2" or M"SUB tau" = C"SUB 1" + C"SUB 2" (log tau)"SUP 2" + C"SUB 3"delta, where C"SUB 1", C"SUB 2" and C"SUB 3" are constrants, specific for each station, tau is the recorded signal duration after Sg-wave onset and delta is the epicentral distance. -Author