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Volumn 308, Issue 5725, 2005, Pages 1139-1144

Earth's free oscillations excited by the 26 December 2004 Sumatra-Andaman earthquake

Author keywords

[No Author keywords available]

Indexed keywords

EARTH (PLANET); GEOLOGY; MATHEMATICAL MODELS; OSCILLATIONS; SEISMOLOGY; SURFACE WAVES;

EID: 21044439958     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1112305     Document Type: Review
Times cited : (229)

References (62)
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    • note
    • The Grotta Gigante pendulum tiltmeter recorded both the 1960 Chile and the 2004 Sumatra-Andaman earthquakes.
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    • note
    • Free oscillations may be resolvable if GPS data from a global network are stacked and corrections for second-order ionospheric effects remove biases that are spatially broad; see (58).
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    • note
    • 2 is 81.2% that computed from the seismometer response alone.
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    • note
    • W = 8.4) was not high enough to allow the observation of hybridized toroidal modes on the vertical seismic components, but they are evident for the 2004 Sumatra-Andaman earthquake.
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    • note
    • Synthetics are computed according to normal-mode perturbation theory (16). Perturbations from a spherical nonrotating Earth model, such as rotation, ellipticity, and lateral heterogeneity are included. We adopt mantle model S20RTS (53) and crustal model crust2.0 (54) to account for lateral heterogeneity. The latest estimates of spheroidal and toroidal eigenfrequencies and quality factors are used in the calculation (55). Modal splitting and coupling due to rotation, ellipticity, and lateral heterogeneity are accounted for on the basis of a group coupling scheme using 36 subgroups of 117 modes below 3 mHz (56).
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    • note
    • This work was supported in part by NSF. Seismic waveform data from the Global Seismographic Network (funded by NSF and U.S. Geological Survey) were obtained from the Incorporated Research Institutions for Seismology (IRIS) Data Management System. Seismic waveform data was also obtained from the Geoscope Program (IPGP France) and the Southern California Earthquake Center.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.