wiki:ShmDocMenuAmplitudeMb

Version 1 (modified by MarcusWalther, 14 years ago) (diff)

--

Menu entry mb

Determines body wave magnitude for teleseismic signals. It needs an amplitude measurement on one or more P waves before, by convention read from WWSSN-SP simulated traces. The steps to perform to come to a magnitude determination are:

From all P amplitudes determined a magnitude will be computed. The formula applied is

mb = log10(ampl/period) + sigma(distance)

where sigma is (from 16 deg to 120 deg in steps of 1 deg):

5.9,5.9,5.9,6.0,6.0,6.1,6.2,6.3,6.3,6.5,6.4,6.5,6.6,
6.6,6.6,6.7,6.7,6.7,6.7,6.7,6.6,6.5,6.5,6.4,6.4,6.5,6.5,6.5,6.5,
6.7,6.8,6.9,6.9,6.8,6.7,6.7,6.7,6.7,6.8,6.8,6.8,6.8,6.8,6.8,6.8,
6.6,7.0,6.9,7.0,7.0,7.0,7.0,7.0,7.0,6.9,6.9,6.9,6.9,6.8,6.8,6.9,
6.9,6.9,6.8,6.7,6.8,6.9,7.0,7.0,7.0,6.9,6.9,7.1,7.0,7.0,7.1,7.1,
7.2,7.1,7.2,7.3,7.4,7.5,7.5,7.4,7.3,7.4,7.5,7.6,7.7,7.8,7.9,7.9,
8.0,8.1,8.2,8.2,8.4,8.6,8.7,8.8,8.9,9.0,9.0,9.0

back to documentation index