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High-resolution analysis of the gravest seismic normal modes after the 2004 Mw = 9 Sumatra earthquake using superconducting gravimeter data

Rosat, S; Sato, Tadahiro; Imanishi, Yuichi; Hinderer, J; Tamura, Yoshiaki; McQueen, Herbert; Ohashi, M


The Mw > 9 Sumatra-Andaman earthquake on December 26, 2004 has strongly excited the low-frequency seismic modes and is a unique opportunity to improve the frequency and damping measurements of the gravest seismic modes. The precise estimation of the frequency splitting of the seismic modes below 1 mHz is needed to improve 1D-density models of the Earth. From this event, 2S1 is observed for the first time without any stacking on both SG (Superconducting Gravimeter) and seismic records. We report...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: Geophysical Research Letters
DOI: 10.1029/2005GL023128


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