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http://hdl.handle.net/2122/1150| Authors: | Scalera, G. | Title: | The geodynamic meaning of the great Sumatran earthquake: Inferences from short time windows | Journal: | New Concepts in Global Tectonics Newsletter | Series/Report no.: | n.35 (June), 2005 | Publisher: | NCGT Newsletter | Issue Date: | 1-Jun-2005 | Keywords: | Polhody anomalies, seismogenesis geodynamics, expanding Earth |
Subject Classification: | 04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes 04. Solid Earth::04.03. Geodesy::04.03.02. Earth rotation 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics |
Abstract: | The difference between the value of seismic moment computed using the surface wave data and the value derived from the normal modes of the Earth requires reinterpretation of the focal mechanism of the Great Sumatran Earthquake (TU=26 December 2004 - 00h 58m, Lat=3.3°N, Lon=95.8°E, H=30 km, M=9.3) based on the second conjugate – near vertical CMT fault plane solution. The displacement of the Earth’s instantaneous rotation pole – observed at ASI of Matera, Italy –, the seismic data (USGS) in the two days following the main shock, the high frequency P-wave radiation, the geomorphologic data, and the satellite data of uplift/subsidence of the coasts (IGG) converge toward this interpretation. A thorough revision or a complete overcoming of the subduction concept is then needed. |
| Appears in Collections: | Article published / in press Manuscripts |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| Sumatra short time windows NCGTjune05(35).pdf | 1.53 MB | Adobe PDF | View/Open |
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