Published September 2006
| public
Journal Article
Open
Wavelet analysis of the seismograms of the 2004 Sumatra-Andaman earthquake and its application to tsunami early warning
- Creators
- Lockwood, Oliver G.
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Kanamori, Hiroo
Abstract
We applied the wavelet transform in an attempt to detect long-period components early in a seismogram. We analyzed the displacement seismograms of the 26 December 2004 Sumatra-Andaman earthquake (Mw = 9.2) and the 28 March 2005 Nias earthquake (Mw = 8.7). Wavelet analysis is able to clearly distinguish the amplitudes of the long-period W phase between the seismograms of the two earthquakes before the S wave reaches the station. It shows that the 2004 earthquake generates a W phase of significantly greater amplitude. This facility has potential application to the rapid identification of truly great earthquakes with high tsunami potential.
Additional Information
Copyright 2006 by the American Geophysical Union Received: 7 February 2006; Revised: 17 June 2006; Accepted: 18 July 2006; Published: 28 September 2006. The lead author is grateful to Caltech's SURF (Summer Undergraduate Research Fellowship) program for providing the opportunity to participate in this research and to L. Stolper for her invaluable support as organizer of the Cambridge-Caltech exchange. We used the Global Seismic Network seismograms of the Incorporated Research Institutions for Seismology. We thank Meredith Nettles and an anonymous reviewer for their thoughtful comments.Files
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Additional details
- Eprint ID
- 5518
- Resolver ID
- CaltechAUTHORS:LOCggg06
- Created
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2006-10-20Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences