The December 26, 2004, off the west coast of northern Sumatra, Indonesia, M_W=9.0, earthquake and the critical-point-like model of earthquake preparation

Long-term seismic activity prior to the December 26, 2004, off the west coast of northern Sumatra, Indonesia, M ^sub W^=9.0 earthquake was investigated using the Harvard CMT catalogue. It is observed that before this great earthquake, there exists an accelerating moment release (AMR) process with th...

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Bibliographic Details
Published in:Acta seismologica sinica 2005-05, Vol.18 (3), p.290-296
Main Author: 蒋长胜 吴忠良
Format: Article
Language:English
Subjects:
2004
coast
Earthquakes
northern
off
Seismic activity
Sumatra
the
west
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Summary:Long-term seismic activity prior to the December 26, 2004, off the west coast of northern Sumatra, Indonesia, M ^sub W^=9.0 earthquake was investigated using the Harvard CMT catalogue. It is observed that before this great earthquake, there exists an accelerating moment release (AMR) process with the temporal scale of a quarter century and the spatial scale of 1 500 km. Within this spatial range, the M ^sub W^=9.0 event falls into the piece-wise power-law-like frequency-magnitude distribution. Therefore, in the perspective of the critical-point-like model of earthquake preparation, the failure to forecast/predict the approaching and/or the size of this earthquake is not due to the physically intrinsic unpredictability of earthquakes.[PUBLICATION ABSTRACT]
ISSN:1674-4519
1000-9116
1867-8777
1993-1344
DOI:10.1007/s11589-005-0077-x