Mm: Use of a variable‐period mantle magnitude for the rapid one‐station estimation of teleseismic moments

Jacques Talandier; Dominique Reymond; Emile A. Okal

doi:10.1029/GL014i008p00840

M_m: Use of a variable‐period mantle magnitude for the rapid one‐station estimation of teleseismic moments

Jacques Talandier^*, Dominique Reymond, Emile A. Okal

^*Corresponding author for this work

Earth and Planetary Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Broadband records of the first passage of Rayleigh waves at Papeete, Tahiti from large circum‐Pacific earthquakes are used to recover in real time their seismic moments. The magnitude concept is used at periods varying from 50 to 300 s. Adequate corrections are made for distance and period. Typical standard deviations are 0.2 orders of magnitude on M_o. This mantle scale M_m can be extended continuously with no additional corrections over 4 orders of magnitude. It can be measured in the frequency‐ or time‐domains, and we describe briefly the automation of the method, with obvious applications in tsunami warning.

Original language	English (US)
Pages (from-to)	840-843
Number of pages	4
Journal	Geophysical Research Letters
Volume	14
Issue number	8
DOIs	https://doi.org/10.1029/GL014i008p00840
State	Published - Jan 1 1987

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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abstract = "Broadband records of the first passage of Rayleigh waves at Papeete, Tahiti from large circum‐Pacific earthquakes are used to recover in real time their seismic moments. The magnitude concept is used at periods varying from 50 to 300 s. Adequate corrections are made for distance and period. Typical standard deviations are 0.2 orders of magnitude on Mo. This mantle scale Mm can be extended continuously with no additional corrections over 4 orders of magnitude. It can be measured in the frequency‐ or time‐domains, and we describe briefly the automation of the method, with obvious applications in tsunami warning.",

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AU - Reymond, Dominique

AU - Okal, Emile A.

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N2 - Broadband records of the first passage of Rayleigh waves at Papeete, Tahiti from large circum‐Pacific earthquakes are used to recover in real time their seismic moments. The magnitude concept is used at periods varying from 50 to 300 s. Adequate corrections are made for distance and period. Typical standard deviations are 0.2 orders of magnitude on Mo. This mantle scale Mm can be extended continuously with no additional corrections over 4 orders of magnitude. It can be measured in the frequency‐ or time‐domains, and we describe briefly the automation of the method, with obvious applications in tsunami warning.

AB - Broadband records of the first passage of Rayleigh waves at Papeete, Tahiti from large circum‐Pacific earthquakes are used to recover in real time their seismic moments. The magnitude concept is used at periods varying from 50 to 300 s. Adequate corrections are made for distance and period. Typical standard deviations are 0.2 orders of magnitude on Mo. This mantle scale Mm can be extended continuously with no additional corrections over 4 orders of magnitude. It can be measured in the frequency‐ or time‐domains, and we describe briefly the automation of the method, with obvious applications in tsunami warning.

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M_m: Use of a variable‐period mantle magnitude for the rapid one‐station estimation of teleseismic moments

Abstract

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