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Authors: Musson, R. M. W.*
Title: Determination of parameters for historicaI British earthquakes
Issue Date: Oct-1996
Series/Report no.: 39/5
Keywords: Earthquake depth
earthquake magnitude
historical earthquakes
Abstract: Examination of 20th century data from the U.K. shows a good correlation between felt area and instrumental magnitude, producing good magnitude values for historical earthquakes where felt area is known; this is a more reliable method than using I0. The equations: ML = 1.03 log A3:; -0.19; ML = 0.92 log A4 + 0.71 give magnitude from areas within isoseismals 3 and 4 MSK. Dcpths for historical earthquakes have also been obtained using a modification of the well-known Sponheuer method, using the program MACDEP; the regional value for (á is 0.003 and depths for events with magnitude above 4 ML range from 3 to 25 km.
Appears in Collections:04.06.99. General or miscellaneous
Annals of Geophysics

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