Real time monitoring of moment magnitude by waveform inversion.

Lee, J., Friederich, W. and Meier, T. (2012) Real time monitoring of moment magnitude by waveform inversion. Geophysical Research Letters, 39 (2). n/a-n/a. DOI 10.1029/2011GL050210.

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Abstract

An instantaneous measure of the moment magnitude (Mw) of an ongoing earthquake is estimated from the moment rate function (MRF) determined in real-time from available seismic data using waveform inversion. Integration of the MRF gives the moment function from which an instantaneousMw is derived. By repeating the inversion procedure at regular intervals while seismic data are coming in we can monitor the evolution of seismic moment and Mw with time. The final size and duration of a strong earthquake can be obtained within 12 to 15 minutes after the origin time. We show examples of Mw monitoring for three large earthquakes at regional distances. The estimated Mw is only weakly sensitive to changes in the assumed source parameters. Depending on the availability of seismic stations close to the epicenter, a rapid estimation of the Mw as a prerequisite for the assessment of earthquake damage potential appears to be feasible.

Document Type: Article
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R06
Kiel University
OceanRep > The Future Ocean - Cluster of Excellence > FO-R09
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1029/2011GL050210
ISSN: 00948276
Projects: Future Ocean
Date Deposited: 04 Oct 2017 15:30
Last Modified: 04 Oct 2017 15:30
URI: http://oceanrep.geomar.de/id/eprint/39636

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