RELATION BETWEEN SEISMIC MOMENT M0 AND SURFACE WAVE MAGNITUDE MS

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REZAPOUR MAHDI; PEARCE R.G.

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Paper Information

Journal: Journal of Sciences, Islamic Republic of Iran Year:2007 | Volume:18 | Issue:2 Page(s): 151-157

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Information Journal Paper

Title

RELATION BETWEEN SEISMIC MOMENT M0 AND SURFACE WAVE MAGNITUDE MS

Author(s)

REZAPOUR MAHDI | PEARCE R.G. | Issue Writer Certificate

Keywords

ISCQ3

MAGNITUDEQ3

SEISMIC MOMENTQ3

SURFACE WAVEQ3

ISCQ3

Abstract

The relation between MS and logM0 is examined using Harvard CMT M0, with Mpragues both and the improved SURFACE WAVE MAGNITUDE scale Mts [1] applied to ISC data. Although Mts shows less scatter than Mpragues, neither dataset supports a slope of MS against logM0 which tends to 1.0 towards smaller MAGNITUDEs. Instead, a good linear fit of slope 0.76 using Mts is found throughout the fitted range of M0=(2.0×1024 to 1.26×1027 dyne-cm), and this linearity extends down to M0=2.5×1023 dyne-cm. This suggests that previous proposals that MS data support a theoretical slope of 1.0 in the low range of MAGNITUDE which may be expected from established relationships, is not justified.

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